Ponomaryov, V. I. “Exercise Addiction and Severity of Emotional Distress in Men, Regularly Subjecting Themselves to Intense Physical Stress in the Form of Bodybuilding”. Psychiatry, Neurology and Medical Psychology, Vol. 1, no. 1, Apr. 2014, pp. 59–64, https://periodicals.karazin.ua/pnmp/article/view/1466.