Merkulov, Y., A. Pyatkov, and D. Merkulova. “Work With Night Shift As a Factor Dysregulation of Autonomic Nervous System of Locomotive Drivers”. Patologicheskaya Fiziologiya I Eksperimental’naya Terapiya (Pathological physiology and experimental Therapy), vol. 57, no. 1, Jan. 2013, pp. 75-80, https://pfiet.ru/article/view/5097.