WESTFAL, K. M. Znaki towarowe w sporcie = Trademarks in sports. Journal of Education, Health and Sport, [S. l.], v. 5, n. 12, p. 666–677, 2015. Disponível em: https://apcz.umk.pl/JEHS/article/view/3329. Acesso em: 30 jun. 2024.