2008

• Powell NB, Riley RW, Kezirian EJ, Kirisoglu CE, Chang E, Guilleminault C. Resting Energy Expenditure in Adults With Sleep-Disordered Breathing. In: Arch Otolaryngol Head Neck Surg. 2008; 134 (12): 1270.1275. Accepted for Publication.

2007

• Powell NB, Sleep Apnea and Snoring Surgical and Non Surgical Therapy, Saunders Elsevier publishers 2008 Chapter 54 pg 326-333
• Sesso DM, Powell NB, Riley RW, Hester JE. Upper airway surgery in the adult. In: Kushida CA, ed. Obstructive Sleep Apnea: Diagnosis and Treatment. New York: Taylor & Francis. Accepted for publication
• Sesso DM, Powell NB, Riley RW. Surgical treatment of sleep-related breathing disorders. In: Kushida CA, ed. Handbook of Sleep Disorders, 2nd ed. New York: Taylor & Francis. Accepted for publication
• Hester JE, Powell NB, Riley RW. Advanced Surgical Treatment of Obstructive Sleep Apnea Syndrome in the Pediatric Patient. In: Pediatric Sleep Disorders, Norman Friedman, ed. London: Egerton
• Powell NB. Driving Drowsy: Time for personal accountability. Int J Sleep Wakefulness-Prim Care 2007; 1(2): 66-9
• Powell NB, Schechtman KB, Riley RW, Guilleminalut c, Chiang RP, Weaver EM. Sleepy Driver Near-Misses May Predict Accident Risks. Sleep , Mar 1;30(3):331-42, 2007
• Schendel SA, Powell NB. Surgical Orthognathic management of sleep apnea. Craniofac Surg. Jul;18(4); 902-11, 2007
• Barrera JE, Powell NB, Riley RW: Facial skeletal surgery in the management of adult obstructive sleep apnea syndrome. Clin Plast Surg Jul;43(3):565-73, 2007

2005

• Hester JE, Powell NB, Riley RW. Hypopharyngeal airway surgery in the pediatric patient with obstructive sleep apnea syndrome. Operative Techniques in Otolaryngology Head and Neck Surgery 16:264-269, 2005
• Eric J. Kezirian, Nelson Bert Powell, Robert W. Riley, Jerome E. Hester. Incidence of Complications in Radiofrequency Treatment of the Upper Airway. Laryngoscope, 115 (7): 1298-304, 2005
• Nelson Powell. Upper Airway Surgery Does Have a Major Role in the Treatment of Obstructive Sleep Apnea -- "The Tail End of the Dog”. Journal of Clinical Sleep Medicine, Vol. 1, No. 3 2005
  

2004

• Hester JE, Troell RJ, Riley RR, Powell NB, Li KK: Reconstructive surgery for sleep disordered breathing. In: Anesthesiologist’s Manual of Surgical Procedures. Jaffe RA, Samuels SI, eds. Lippincott Williams & Wilkins 2004, 193-198.

2003

• Christian Guilleminault, Nelson B. Powell, Sandra Martinez, Clete Kushida, Tifenn Raffray, Luciana Palombini, Pierre Philip. Preliminary Observations on the Effects of Sleep time in a Sleep Restriction Paradigm. Sleep Medicine 2003 4: 177-184
• Raffray T, Guilleminault C, Powell NB, Martinez S, Kushida C, Palombini L, Philip P. Effets Des Horaires DE Sommeil Lors D’une restriction De Sommeil. Proceeding of the 2003 Congress of the French Sleep Research Society. 2003 p.133
• Robert W. Riley, M.D., D.D.S.; Nelson B. Powell, MD; Kasey K. Li, M.D., D.D.S.; Edward M. Weaver, MD, MPH, and Christian Guilleminault, MD. An Adjunctive Method of Radiofrequency Volumetric Tissue Reduction of the Tongue for OSAS: Otolaryngology-Head and Neck Surgery, vol. 1, no. 1, pp. 37-42

2002

• Powell N, Schechtman K, Riley R, Li K, Guilleminault C. Sleepy Driving: Accidents and Injury. Otolaryngology Head and Neck Surgery. Otolaryngology Head and Neck Surg 2002; 126:217-27
• Li KK, Powell NB, Riley RW, Guilleminault C. Temperate-controlled radiofrequency tongue base reduction for sleep-disordered breathing: Long term outcomes. Otolaryngology Head and Neck Surgery 2002; 127:230-233
• Li KK, Guilleminault C, Riley RW, Powell NB. Obstructive sleep apnea and maxillomandibular advancement: an assessment of airway changes using radiographic and nasopharyngoscopic examinations. J. Oral Maxillofacial Surgery, 60(5): 526-30; discussion 531. 2002
• Li KK, Powell NB, Riley RW,Guilleminault C. Distraction osteogenesis in adult obstructive sleep apnea surgery: A premliminary report. J Oral Maxillofac Surg. 2002 Jan;60(1):6-10

2001

• Powell NB, Schechtman KB, Riley RW, Li K, Troell R, Guilleminault C: The road to danger: the comparative risks of driving while sleepy. Laryngoscope 2001;111:887-893
• Powell N, Zonato A, Weaver E, Li K, Troell R, Riley R, Guilleminault C. Radiofrequency Treatment of turbinate Hypertrophy in Subjects Using Continuous Positive Airway Pressure: A Randomized, Double-Blind, Placebo-Controlled Clinical Pilot Trial. The Laryngoscope, 2001;111;1783-90
• Li KK, Riley RW, Powell NB, Troell RJ.: Obstructive sleep apnea surgery: genioglossus advancement revisited. J Oral Maxillofac Surg 2001 Oct;59(10):1181-4
• Li KK, Troell RJ, Riley RW, Powell NB, Koester U, Guilleminault C.: Uvulopalatopharyngoplasty, maxillomandibular advancement, and the velopharynx. Laryngoscope 2001 Jun;111(6):1075-8
• Li KK, Riley RW, Powell NB, Guilleminault C. Patient's perception of the facial appearance after maxillomandibular advancement for obstructive sleep apnea syndrome. J Oral Maxillofac Surg 2001 Apr;59(4):377-80; discussion 380-1

2000

• Guilleminault C, Kim YD, Palombini L, Li K, Powell N. Upper airway resistance syndrome and its treatment Sleep. 2000 Jun 15;23 Suppl 4:S197-2000
• Guilleminault C, Chervin R, Palombini L, Powell N: Radiofrequency (Pacing and Thermic Effects) in the treatment of sleep-disordered breathing. Sleep 2000;23(4):182-186
• Riley R, Powell N, Troell R, Li K: Surgery and obstructive sleep apnea: long-term clinical outcomes. Otolaryngol Head Neck Surg 2000;122(3):415-421
• Troell R, Powell N, Riley R, Li K, Guilleminault C: Comparison of postoperative pain between laser-assisted uvulopalatoplasty, uvulopalatopharyngoplasty, and radiofrequency volumetric tissue reduction of the palate. Otolaryngol Head Neck Surg 2000;122:402-409
• Troell R, Powell N, Riley R, Li K: Evaluation of a new procedure for nasal alar rim and valve collapse: Nasal alar rim reconstruction. Otolaryngol Head Neck Surg 2000;122:204-211
• Li KK, Powell NB, Riley RW, Troell RJ, Guilleminault C. Radiofrequency volumetric reduction of the palate: An extended follow-up study. Otolaryngol Head Neck Surg. 2000 Mar;122(3):410-4
• Li KK, Powell NB, Riley RW, Zonato A, Gervacio L, Guilleminault C. Morbidly obese patients with severe obstructive sleep apnea: is airway reconstructive surgery a viable treatment option? Laryngoscope. 2000 Jun;110(6):982-7
• Li KK, Riley RW, Powell NB, Guilleminault C. Maxillomandibular advancement for persistent obstructive sleep apnea after phase I surgery in patients without maxillomandibular deficiency. Laryngoscope. 2000 Oct;110(10 Pt 1):1684-8
• Li KK, Kushida C, Powell NB, Riley RW, Guilleminault C. Obstructive sleep apnea syndrome: a comparison between Far-East Asian and white men. Laryngoscope. 2000 Oct;110(10 Pt 1):1689-93
• Li KK, Riley RW, Powell NB, Gervacio L, Troell RJ, Guilleminault C. Obstructive sleep apnea surgery: patient perspective and polysomnographic Results Otolaryngol Head Neck Surg. 2000 Nov;123(5):572-5
• Li KK, Riley RW, Powell NB, Zonato A. Fiberoptic nasopharyngolaryngoscopy for airway monitoring after obstructive sleep apnea surgery. J Oral Maxillofac Surg. 2000 Dec;58(12):1342-5; discussion 1345-6
• Li K, Riley R, Powell N, Zonato A, Troell R, Guilleminault C: Postoperative airway findings after maxillomandibular advancement for obstructive sleep apnea. Laryngoscope 2000;110:325-327
• Li KK, Riley RW, Guilleminault C. An Unreported Risk in the Use of Home Nasal CPAP and Home Nasal Ventilation in Children: Mid-face Hypoplasia. Chest;117(3):916-918, 2000
• Li KK, Powell NB, Riley RW, Troell RJ, Guilleminault C. Long-Term results of maxillomandibular advancement surgery. Sleep Breath, 4(3): 137-140. 2000
• Troell R, Li K, Powell N, Riley R: Radiofrequency tongue base reduction in sleep-disordered breathing. Operative Techniques in Otolaryngology-Head Neck Surg 2000; 11(1):47-49
• Troell R, Li K, Powell N, Riley R: Radiofrequency of the soft palate in snoring and sleep-disordered breathing. Operative Techniques in Otolaryngology-Head Neck Surg 2000; 11(1):21-23
• Li K, Powell N, Riley R, Troell R, Guilleminault C: Radiofrequency volumetric reduction for hypertrophic turbinate. Operative Techniques in Otolaryngology-Head Neck Surg 2000; 11(1):24-25

1999

• Powell N, Riley R, Guilleminault C: Radiofrequency tongue base reduction in sleep disordered-breathing-a pilot study. Otolaryngol Head Neck Surg 1999;120:656-664
• Powell N, Riley R, Schechtman K, Blumen M, Dinges D, Guillleminault C: A comparative model: Reaction time performance in sleep-disordered breathing versus alcohol impaired controls. Laryngoscope 1999;109:1648-1654
• Pelayo R, Powell N. Evaluation of obstructive sleep apnea by polysomnography prior to pediatric adenotonsillectomy. Arch Otolaryngol Head Neck Surg. 1999 Nov;125(11):1282-3
• Li KK, Powell NB, Kushida C, Riley RW, Adornato B, Guilleminault C. A comparison of Asian and white patients with obstructive sleep apnea syndrome. Laryngoscope. 1999 Dec;109(12):1937-40
• Li K, Riley R, Powell N, Troell R, Guilleminault C: Overview of phase II surgery for obstructive sleep apnea. ENT-Ear, Nose & Throat Journal, 1999;78(11):851-857
• Li K, Riley R, Powell N, Troell R, Guilleminault C: Overview of phase I surgery for obstructive sleep apnea. ENT-Ear, Nose & Throat Journal, 1999;78(11):851-857

1998

• Powell N, Riley R, Troell R, Li K, Blumen M, Guilleminault C: Radiofrequency volumetric tissue reduction of the palate in subjects with sleep-disordered breathing. Chest 1998;113:1163-1174
• Powell N, Riley R, Robinson A: Surgical Management of obstructive sleep apnea syndrome. Clinics in Chest Medicine 1998;19(1):77-86
• Li K, Powell N, Riley R, Troell R: Radiofrequency volumetric tissue reduction for treatment of turbinate hypertrophy-a pilot study. Otolaryngol Head Neck Surg 1998;119(6):569-573.
• Troell RJ, Riley RW, Powell NB, Li K. Surgical management of the hypopharyngeal airway in Sleep-Disordered Breathing. Otolaryngol Clin North Am. 1998 Dec;31(6):979-1012. Review
• Troell RJ, Riley RW, Powell NB, Li K. Long-term results of surgical management of Sleep-Disordered Breathing: are our patients really benefiting? Otolaryngol Clin North Am. 1998 Dec;31(6):1031-5. Review
• Troell R, Powell N, Riley R: Hypopharyngeal airway surgery for obstructive sleep apnea syndrome. Semin Respir Crit Care Med 1998;19(2):175-183

1997

• Powell N, Riley R, Guilleminault C, Troell R, Blumen M: Radiofrequency volumetric reduction of the tongue: a porcine pilot study for the treatment of obstructive sleep apnea syndrome. Chest 1997;111:1348-1355
• Guilleminault C, Hill MH, Simmons FB, Powell N, Riley R, Stoohs R. Passive constriction of the upper airway during central apneas: fiberoptic and EMG investigations. Respir Physiol. 1997 Apr;108(1):11-22
• Riley R, Powell N, Guilleminault C, Pelayo R, Troell R: Obstructive sleep apnea surgery risk management and complications. J Otolaryngol Head Neck Surg 1997;117:648-652

1996

• Powell N, Riley R, Guilleminault C, Troell R: A reversible uvulopalatal flap for snoring and sleep apnea syndrome. Sleep 1996;19(7):593-599
• Riley R, Troell R, Powell N: Obstructive sleep apnea syndrome: current surgical concepts. Oral Maxillofac Surg Knowledge Update 1996

1995

• Guilleminault C, Powell N, Bowman B, Stoohs R: The effect of electrical stimulation on obstructive sleep apnea syndrome. Chest, 1995;107:67-7352)
• Guilleminault C, Partinen M, Hollman K, Powell N, Stoohs R. Familial aggregates in obstructive sleep apnea syndrome. Chest. 1995 Jun;107(6):1545-51
• Eversole LR, Duffey DC, Powell NB. Clear cell odontogenic carcinoma. A clinicopathologic analysis. Arch Otolaryngol Head Neck Surg. 1995 Jun;121(6):685-9
• Powell N, Riley R: A surgical protocol for sleep disordered breathing. Oral Maxillofac Surg Clin N Am, 1995;7:345-356
• Riley R, Powell N, Guilleminault C, Clerk A, Troell R: Obstructive sleep apnea - trends in therapy. West J Med, 1995;162:143-148

1994

• Riley R, Powell N, Guilleminault C, Clerk A: Obstructive sleep apnea and the hyoid bone-a revised surgical procedure. J Otolaryngol Head Neck Surg, 1994;111: 717-721

1993

• Riley R, Powell N, Guilleminault C, Clark A: Obstructive sleep apnea syndrome: a surgical protocol for dynamic upper airway reconstruction. J Oral Maxillofac Surg, 1993;51:742-747
• Riley R, Powell N, Guilleminault C: Obstructive sleep apnea syndrome: a review of 306 consecutively treated surgical patients. Otolaryngol Head Neck Surg, 1993;108:117-125
• Powell N, Riley R: Malar contouring by zygomaticomaxillary osteotomies. In: T. Nique, H. Tu (Eds.), Anesthesia for Facial Plastic Surgery, New York: Thieme, 1993, pg 64-65
• Guilleminault C, Powell N, Stoohs R, Bowman B: Obstructive sleep apnea and electrical upper airway stimulations during sleep. Am Rev Respir Dis, 1993;147:A683

1991

• Powell N, Riley R, Guilleminault C: Maxillofacial surgical techniques for hypopharyngeal obstruction in obstructive sleep apnea. In: G. Katsantonis (Eds.), Operative Techniques in Otolaryngology-Head and Neck Surgery, 1991, 2:112-119
• Powell N, Riley R, Guilleminault C: Rationale and indications for surgical treatment in obstructive sleep apnea syndrome. In: G. Katsantonis (Eds.), Operative Techniques in Otolaryngology-Head and Neck Surgery, 1991, 2:87-90

1990

• Riley R, Powell N, Guilleminault C: Maxillary mandibular and hyoid advancement and obstructive sleep apnea: a review of 40 patients. J Oral Maxillofac Surg, 1990;48:20-26
• Riley R, Powell N: Maxillofacial surgery and obstructive sleep apnea. In: C. Koopman (Eds.), Otolaryngologic Clinics of North America, 1990, 23:809-826
• Riley R, Powell N, Guilleminault C: Maxillofacial surgery and nasal CPAP: a comparison of treatment for obstructive sleep apnea syndrome. Chest, 1990;98:1421-1425
• Powell N: Speech changes following uvulopalatopharyngoplasty: complication or acceptable results? Chest, 1990;97:5-6

With few exceptions, the majority of papers from 1989 and before can be reached through PubMed. However, please note you must enter the entire name of the paper you wish to search for in the "search" field at the PubMed site

1989

• Riley R, Powell N, Guilleminault C: Inferior mandibular osteotomy and hyoid myotomy suspension for obstructive sleep apnea: a review of 55 patients. J Oral Maxillofac Surg, 1989;47:159-164
• Riley R, Powell N, Guilleminault C: Maxillofacial surgery and obstructive sleep apnea: a review of 80 patients. Otolaryngol Head and Neck Surg, 1989;101:353-361
• Ross ND, Powell NB, Riley RW, Guilleminault C, Nino-Murcia G: More on obstructive sleep apnea. Am J Orthod Dentofacial Orthop. 1989 Apr;95(4):41A-42A
• Kowall J, Clark G, Nino-Murcia G, Powell N. Precipitation of obstructive sleep apnea during pregnancy. Obstet Gynecol. 1989 Sep;74(3 Pt 2):453-5
• Guilleminault C, Partinen M, Praud JP, Quera-Salva MA, Powell N, Riley R: Morphometric facial changes and obstructive sleep apnea in adolescents. J Pediatr, 1989;114:997-999
• Guilleminault C, Quera-Salva MT, Powell NB, Riley RW: Maxillo-mandibular surgery for obstructive sleep apnea. Eur J Respir Dis, 1989;2:604-612
• Powell N, Riley R: Facial contouring with outer table calvarial bone: a four-year experience. Arch Otolaryngol Head Neck Surg, 1989; 115:1454-145825)
• Powell N, Riley R: Pericranial free grafts in the face. Arch Otolaryngol Head Neck Surg, 1989;115:187-192

1988

• Guilleminault C, Quera-Salva MT, Powell N, Riley R: Maxillo-mandibular surgery as a treatment for obstructive sleep apnea. In C H Chouard (Eds.), Chronic Rhonchopathy. Paris: John Libbey Eurotext, pp320-327, 1988
• Powell N: Use of facial osteotomies for aesthetic and reconstructive contouring. Arch Otolaryngol Head Neck Surg, 1988;114:378-379
• Guilleminault C, Quera-Salva MT, Powell N, Riley R, Romaker A, Baldwin R, Nino-Murcia G: Nocturnal asthma, snoring, small pharynx, and nasal CPAP. Eur Resp J, 1988;1:902-907
• Powell N, Riley R, Guilleminault C, Nino-Murcia G: Obstructive sleep apnea, continuous positive airway pressure and surgery. Otolaryngol Head and Neck Surg, 1988;99:362-369
• Powell N, Riley R, Laub D: A new approach to evaluation and surgery of the malar complex. Ann Plast Surg, 1988;20(3):206-214

1987

• Powell N, Riley R: Cranial bone grafting in facial aesthetic and reconstructive contouring. Otolaryngol Head and Neck Surg, 1987;113:713-719
• Riley R, Powell N, Guilleminault C, Ware W: Obstructive sleep apnea syndrome following surgery for mandibular prognathism. J Oral Maxillofac Surg, 1987;45:450-452
• Guilleminault C, Quera-Salva MT, Powell N, Riley R, Romaker A, Baldwin R, Nino-Murcia G: Nocturnal asthma, upper airway anatomical abnormality, and nasal CPAP. 5th International congress of sleep research, Abstracts. Copenhagen, Denmark, June 28-July 3, 1987
• Guilleminault C, Powell NB, Riley RW: Cranio-facial abnormalities and upper airway surgery in obstructive sleep apnea. 22nd Annual meeting of the S.E.P.C.R., proceedings and Abstracts. Antwerp, June 22-26, 1987, also Bull Eur Physiopath Resp, (Abstract) 1987;23(12):420s
• Powell N, Riley R, Guilleminault C: Upper airway surgery and obstructive sleep apnea: an indication for nasal CPAP. 22nd Annual meeting of the S.E.P.C.R., proceedings and Abstracts. Antwerp, June 22-26, 1987, also Bull Eur Physiopath Resp, (Abstract) 1987;23(12):420s
• Riley R, Powell N, Guilleminault C: Current surgical concepts for obstructive sleep apnea syndrome. J Oral Maxillofac Surg 1987;45:149-157

1986

• Riley R, Powell N, Guilleminault C: Cephalometric roentgenograms and computerized tomographic scans in obstructive sleep apnea. Sleep, 1986;9(4):514-515
• Guilleminault C, Heldt G, Powell N, Riley R: Small upper airway: A familial risk factor for apnea in near miss SIDS infants and their parents. Lancet 1986;402-407
• Schroer K, Powell N. Permanent eyeliner. Microsurgical eye enhancement. AORN J. 1986 Mar;43(3):648-51
• Riley R, Powell N, Guilleminault C: Inferior sagittal osteotomy of the mandible with hyoid myotomy-suspension: A new procedure for obstructive sleep apnea. Otolaryngol Head and Neck Surg 1986;94:589-593
• Riley R, Powell N, Guilleminault C, Nino-Murcia G: Maxillary, mandibular and hyoid advancement: An alternative to tracheostomy in obstructive sleep apnea syndrome. Otolaryngol Head and Neck Surg 1986;94:584-588

1985

• Riley R, Guilleminault C, Powell N, Simmons FB: Palatopharyngoplasty failure, cephalometric roentgenograms, and obstructive sleep apnea. Otolaryngol Head and Neck Surg 1985;93:240-244
• Guilleminault C, Riley R, Powell N: Development of sleep apnea in normal subjects following mandibular osteotomy with retrusion: Two case histories. Chest 1985;88:776-778
• Hansen LS, Eversole LR, Green TL, Powell N: Clear cell odontogenic tumor - a new histologic variant with aggressive potential. Head and Neck Surg 1985;8:115-123

1984

• Guilleminault C, Riley R, Powell N: Obstructive sleep apnea and abnormal cephalometric measurements. Chest 1984;86:793-794
• Riley R, Guilleminault C, Powell N, Derman S: Mandibular Osteotomy and hyoid bone advancement for obstructive sleep apnea: A case report. Sleep 1984;7:79-82

1983

• Riley R, Guilleminault C, Herran J, Powell N: Cephalometric analysis and flow-volume loops in obstructive sleep apnea patients. Sleep 1983;6:303-311
• Powell N, Guilleminault C, Riley R: Mandibular advancement and obstructive sleep apnea syndrome. Bull. Europ.Physiopath (Clinical Respiratory Physiology) 1983;19:607-610

Books and Chapters:

• Powell N, Riley R, Guilleminault C: Surgical treatment of obstructive sleep apnea. In: M. Kryger (Eds.), Principles and Practice of Sleep Medicine, 4th ed. Philadelphia, W.B. Saunders, 2005
• Hester JE, Powell NB, Riley RW: Advanced Surgical Treatment of Obstructive Sleep Apnea Syndrome in the Pediatric Patient.” In: Pediatric Sleep Disorders, Norman R. Friedman and Mark A. Richardson eds. <Need date>
• Hester JE, Powell NB, Riley RW: Hypopharyngeal Airway Surgery in the Pediatric Patient. Operative Techniques in Otolaryngology Head and Neck Surgery. 16:264-269, 2005
• Hester JE, Troell RJ, Riley RW, Powell NB, Li KK: Reconstructive surgery for sleep disordered breathing. In: Anesthesiologist’s Manual of Surgical Procedures. Jaffe RA, Samuels SI, eds. Lippincott Williams & Wilkins. 193-198, 2004
• Riley R, Powell N, Li K, Guilleminault C: Surgical treatment of obstructive sleep apnea. In: M. Kryger (Eds.), Principles and Practice of Sleep Medicine, 3rd ed. Philadelphia, W.B. Saunders, 1998
• Powell N, Riley R, Guilleminault C: The Hypopharynx Upper Airway Reconstruction in obstructive sleep apnea syndrome. In: D. Fairbanks (Eds.), Snoring and Obstructive Sleep Apnea, 2nd ed. New York: Raven Press, 1994, 193-209
• Powell N, Guilleminault C, Riley R: Surgical treatment of obstructive sleep apnea. In: M. Kryger (Eds.), Principles and Practice of Sleep Medicine, 2nd ed. Philadelphia, W.B. Saunders, 1994, 706-721
• Powell N, Riley R: Malar contouring by zygomaticomaxillary osteotomies. In: T. Nique, H. Tu (Eds.), Anesthesia for Facial Plastic Surgery, New York: Thieme, 1993, 64-65
• Powell N, Riley R, Guilleminault C.: Maxillofacial surgery for obstructive sleep apnea. In: M. Partinen & C. Guilleminault (Eds.), Obstructive Sleep Apnea Syndrome: Clinical Research and Treatment, New York: Raven, 1989, 153-182
• Guilleminault C, Riley R, Powell N: Surgical treatment of obstructive sleep apnea. In: M. Kryger, T. Roth, W. Dement (Eds.), Principles and Practice of Sleep Medicine, Philadelphia, W.B. Saunders, 1989, 571-583
• Powell NB. Aesthetic Evaluation of Nasal Contour. Otolaryngology Head and Neck Surgery, St. Louis, C.V. Mosby Co.,1986
• Powell NB, Humphries B. Proportions of the Aesthetic Face. New York, Theime-Stratton, Inc., 1984