@misc{Kuśnierz_Cezary_Variation_2025,
 author={Kuśnierz, Cezary and Wosinek, Patryk and Marzec, Arkadiusz},
 type={artykuł},
 publisher={Projack},
 title={Variation in aggression levels in selected combat sports and martial arts},
 address={Częstochowa},
 year={2025},
 language={eng},
}