Kiełpiński, Krzysztof. “The Concepts of Crimen Pessimum, Delicta Graviora, Delicta Reservata in Canonical Criminal Law. A Legal Historical Analysis”. Prawo Kanoniczne 69, no. 1 (March 30, 2026): 65–85. Accessed April 9, 2026. https://czasopisma.uksw.edu.pl/index.php/pk/article/view/16562.