Nowak, Tomasz. “Introduction to the Study of the Biological Evolution of Communication. On the Trail of a Hypothesis”. Zoophilologica. Polish Journal of Animal Studies, no. 1 (December 23, 2015): 133-147. Accessed May 17, 2024. https://journals.us.edu.pl/index.php/ZOOPHILOLOGICA/article/view/4810.