ŠPELDA, Daniel. Huygens and Fontenelle on Aliens and Humans. Teorie vědy / Theory of Science, [S. l.], v. 39, n. 2, p. 141–165, 2018. DOI: 10.46938/tv.2017.385. Disponível em: https://teorievedy.flu.cas.cz/index.php/tv/article/view/385. Acesso em: 8 mar. 2025.