Kopiec, Jan. “Cardinal A. Kakowski’s Involvement in the Independence Issue During the Regency Council Period (1917-1918)”. Kościół i Prawo 14, no. 2 (December 29, 2025): 37–50. Accessed January 2, 2026. https://czasopisma.tnkul.pl/index.php/kip/article/view/4589.