HABEL, Angelika; MROCZKOWSKI, Sławomir. Cele i zadania ogrodów zoologicznych = The objectives and tasks of zoos. Journal of Education, Health and Sport, [S. l.], v. 5, n. 8, p. 521–528, 2015. Disponível em: https://apcz.umk.pl/JEHS/article/view/3019. Acesso em: 24 jan. 2025.