1. Bixler EO, Kales A, Soldatos CR, et al.: Prevalence of sleep disorders in the Los Angeles metropolitan area. Am J Psychiatry 1979; 136: 1257–1262.
2. Cadieux RJ, Woolley D, Kales JD: Sleep disorders in the elderly, in Berlin RM, Soldatos CR (eds): Psychiatric Medicine. Sleep Disorders in Psychiatric Practice, 1986. Longwood, FL, Ryandic Publishing, 1987, pp 165–180.
3. Dement WC, Miles LE, Carskadon MA: “White paper” on sleep and aging. J Am Geriatr Soc 1982; 30: 25–50.
4. Kales A, Kales JD: Evaluation and Treatment of Insomnia. New York, Oxford University Press, 1984.
5. Kales JD: Aging and sleep, in Rochstein M, Goldman R (eds.): Physiology and Pathology of Human Aging. New York, Academic Press, Inc, 1975, pp 188–202.