Pujszo, M., R. Stępniak, and N. Jasińska. “Aggression Vs. Psychic Resilience System - on an Example of Male Judo. The Case Study”. Journal of Education, Health and Sport, vol. 9, no. 9, Sept. 2019, pp. 663-9, https://apcz.umk.pl/JEHS/article/view/7478.