Araki, Shunichi, and Iwasaki, Kenji. "Death Due to Overwork (Karoshi): Causation, health service, and life expectancy of Japanese males." Japan Medical Association Journal, vol. 48, no. 2, February, 2005, pg. 92-98. http://www.med.or.jp/english/pdf/[liên kết hỏng] 2005_02/092_098.pdf. Truy cập: 19 Jan, 2018.