1. 1. Reilly JJ, Silverman EK, Shapiro SD. chronic obstructive pulmonary disease: In Harrison's Principles of Internal Medicine., eds-Kasper DL, Braunwald E, Fauci AS, Hauser SL, Longo DL, Jameson JL. The McGrow Hill Companies. 2005; pp: 1547-1553.
2. 2. Emery CF, Green MR, Suh S. Neuropsychiatric Function in Chronic Lung Disease: the Role of Pulmonary Rehabilitation. Respiratory Care 2008; 53 (9): 1208-1216.
3. 3. Thompson WL; and Thompson II TL. "Pulmonary disease". In: Principles of medical psychiatry. Editors: Stodermire and Fogel. Grune and Stratton inc. orlando 1987, 553-570.
4. 4. Norwood RJ. A review of etiologies of depression in COPD. International Journal of COPD 2007; 2 (4): 485-491.
5. 5. Catherine L, Kim LL, Simon BL, Gilles D, Guillaume L, Andre C, Manon L. Sex differences in the prevalence of psychiatric disorders and psychological distress in patients with COPD. Chest, the cardiopulmonary and critical care Journal 2007; 132 (1): 148-155.