KOWALEWSKA, Agata. Szóste wymieranie. Tutoring Gedanensis, [S. l.], v. 4, n. 2, p. 58–63, 2019. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/tutee/article/view/5880. Acesso em: 3 maj. 2024.