SŁAWEK, Tadeusz. Blisko ziemi. Kilka lekcji jeża. Zoophilologica. Polish Journal of Animal Studies, [S. l.], n. 1, p. 45–60, 2015. Disponível em: https://trrest.vot.pl/ojsus/index.php/ZOOPHILOLOGICA/article/view/4822. Acesso em: 6 maj. 2025.