Szabo, Attila, Szilvia Boros, and Júlia Patakiné Bősze. “Are There Differences in Life-Satisfaction, Optimism, Pessimism and Perceived Stress Between Therapeutic and Mastery Exercisers? A Preliminary Investigation”. Baltic Journal of Sport and Health Sciences 3, no. 114 (October 28, 2019). Accessed May 17, 2022. https://journals.lsu.lt/baltic-journal-of-sport-health/article/view/807.