KUŚNIERZ, Cezary. Motivation to take martial arts training in the opinions of boxing and MMA fighters. Sport and Tourism Central European Journal, [S. l.], v. 2, n. 1, p. 111–121, 2019. DOI: 10.16926/sit.2019.02.07. Disponível em: https://czasopisma.ujd.edu.pl/index.php/sport/article/view/253. Acesso em: 29 mar. 2024.