KLAFKOWSKI, Piotr. Citizen of the universe. Konstantin Tsiolkovsky’s cosmic philosophy and science fiction. Studia Rossica Gedanensia, [S. l.], n. 4, p. 335–360, 2017. Disponível em: https://czasopisma.bg.ug.edu.pl/index.php/SRG/article/view/63. Acesso em: 29 kwi. 2024.