Iwasaki M; Akechi T; Uchitomi Y; Tsugane S (April 2005). "Cigarette Smoking and Completed Suicide among Middle-aged Men: A Population-based Cohort Study in Japan". Annals of Epidemiology. 15 (4): 286–92. doi:10.1016/j.annepidem.2004.08.011. PMID15780776.
Iwasaki M; Akechi T; Uchitomi Y; Tsugane S (April 2005). "Cigarette Smoking and Completed Suicide among Middle-aged Men: A Population-based Cohort Study in Japan". Annals of Epidemiology. 15 (4): 286–92. doi:10.1016/j.annepidem.2004.08.011. PMID15780776.