5Kuble- Ross E. On death and dying. New York: Macmillan.1969.
6Orlando M, Burnam MA, et al. Re - estimating the prevalence of psychiatric disorders in a nationally representative sample of persons receiving care for HIV: Results from the HIV cost and services utilization study. International Journal of Methods Psychiatric Research, 2002,11:75 - 82.
7Heckman TG, Heckman BD, Kochman A, et al. Psychological symptoms among persons 50 years of age and older living with HIV disease. Aging Mental Health, 2002,6 : 121 - 128.
8Dimeo F, Bauer M, Varahram I, et al. Benefits from aerobic exercise in patients with major depression: a pilot study. British Journal of Sports Medicine, 2001,35 : 114 - 117.
9Lane AM, Lovejoy DJ. The effects of exercise on mood changes : The moderating effect of depressed mood. Journal of Sports Medicine and Physical Fitness, 2001,41 : 539 - 545.
10Hale BS, Raglin JS. State anxiety responses to acute resistance training and step aerobic exercise across eight weeks of training. Journal of Sports Medicine and Physical Fitness,2002,42:105 - 112.