KWIATEK, Łukasz. Searching for the roots of natural language: intentional communication among non-human primates. Philosophical Problems in Science, [S. l.], n. 55, p. 43–73, 2014. DOI: 10.59203/zfn.55.35. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/35. Acesso em: 5 dec. 2025.