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Giltay, Erik J.; Geleijnse, Johanna M.; Zitman, Frans G.; Hoekstra, Tiny; Schouten, Evert G. (новембар 2004). „Dispositional Optimism and All-Cause and Cardiovascular Mortality ina Prospective Cohort of Elderly Dutch Men and Women”. Archives of General Psychiatry. 61 (11): 1126—35. PMID15520360. doi:10.1001/archpsyc.61.11.1126.CS1 одржавање: Формат датума (веза)
Giltay, Erik J.; Zitman, Frans G.; Kromhout, Daan (март 2006). „Dispositional optimism and the risk of depressive symptoms during 15 years of follow-up: The Zutphen Elderly Study”. Journal of Affective Disorders. 91 (1): 45—52. PMID16443281. doi:10.1016/j.jad.2005.12.027.CS1 одржавање: Формат датума (веза)
Patton, George C.; Tollit, Michelle M.; Romaniuk, Helena; Spence, Susan H.; Sheffield, Jeannie; Sawyer, Michael G. (фебруар 2011). „A Prospective Study of the Effects of Optimism on Adolescent Health Risks”. Pediatrics. 127 (2): 308—16. PMID21220404. doi:10.1542/peds.2010-0748.CS1 одржавање: Формат датума (веза)
Scheier, Michael F.; Carver, Charles S. (1985). „Optimism, coping, and health: Assessment and implications of generalized outcome expectancies.”. Health Psychology. 4 (3): 219—247. PMID4029106. doi:10.1037/0278-6133.4.3.219.
Kubzansky, Laura D.; Sparrow, David; Vokonas, Pantel; Kawachi, Ichiro (новембар 2001). „Is the Glass Half Empty or Half Full? A Prospective Study of Optimism and Coronary Heart Disease in the Normative Aging Study”. Psychosomatic Medicine. 63 (6): 910—916. CiteSeerX10.1.1.492.6714. PMID11719629. S2CID19463805. doi:10.1097/00006842-200111000-00009.CS1 одржавање: Формат датума (веза)
Giltay, Erik J.; Geleijnse, Johanna M.; Zitman, Frans G.; Hoekstra, Tiny; Schouten, Evert G. (новембар 2004). „Dispositional Optimism and All-Cause and Cardiovascular Mortality ina Prospective Cohort of Elderly Dutch Men and Women”. Archives of General Psychiatry. 61 (11): 1126—35. PMID15520360. doi:10.1001/archpsyc.61.11.1126.CS1 одржавање: Формат датума (веза)
Giltay, Erik J.; Zitman, Frans G.; Kromhout, Daan (март 2006). „Dispositional optimism and the risk of depressive symptoms during 15 years of follow-up: The Zutphen Elderly Study”. Journal of Affective Disorders. 91 (1): 45—52. PMID16443281. doi:10.1016/j.jad.2005.12.027.CS1 одржавање: Формат датума (веза)
Patton, George C.; Tollit, Michelle M.; Romaniuk, Helena; Spence, Susan H.; Sheffield, Jeannie; Sawyer, Michael G. (фебруар 2011). „A Prospective Study of the Effects of Optimism on Adolescent Health Risks”. Pediatrics. 127 (2): 308—16. PMID21220404. doi:10.1542/peds.2010-0748.CS1 одржавање: Формат датума (веза)