Bagieński, Witold. “The Office for State Protection 1992 Investigation into the Destruction of MSW Department I Operational Records Between 1989 and 1990”. Przegląd Archiwalny Instytutu Pamięci Narodowej 18 (December 30, 2025): 131–172. Accessed November 11, 2026. https://czasopisma.ipn.gov.pl/index.php/pa/article/view/2817.