MARCINKIEWICZ, M. Code Name “Horizon”. Preparations for the Introduction of a State of Emergency in the Polish People’s Republic, 1988–1989 . Institute of National Remembrance Review, [S. l.], n. 6, p. 191–251, 2025. DOI: 10.48261/INRR240608. Disponível em: https://czasopisma.ipn.gov.pl/index.php/inrr/article/view/2743. Acesso em: 3 jan. 2026.