ŽÁČEK, P. Charles Katek, a Friend Devoted to Our Cause. A Case of American-Czechoslovak Intelligence Cooperation, 1943–1945 (1948). Aparat Represji w Polsce Ludowej 1944-1989, [S. l.], n. 22, p. 305–347, 2025. DOI: 10.48261/arprl242210. Disponível em: https://czasopisma.ipn.gov.pl/index.php/arpl/article/view/2648. Acesso em: 15 grudz. 2025.