RAJCH, Marek. Literatura science fiction Stanisława Lema a cenzura literacka w NRD w latach 50. i 60. XX wieku. Kultura Media Teologia, [S. l.], v. 58, p. 281–293, 2024. DOI: 10.21697/kmt.2024.58.14. Disponível em: https://czasopisma.uksw.edu.pl/index.php/kmt/article/view/14445. Acesso em: 6 grudz. 2025.