FILIPOWICZ, Anna. Zwierzęce początki muzyki. O Ptasim radiu Juliana Tuwima. Zoophilologica. Polish Journal of Animal Studies, [S. l.], n. 2, p. 187–203, 2016. Disponível em: https://journals.us.edu.pl/index.php/ZOOPHILOLOGICA/article/view/6179. Acesso em: 23 luty. 2026.