Kajzer, Leszek. “On the Defensive Architecture of the Province of Łęczyca in the Late Middle Ages and in Modem Times – 15 Years Later”. Acta Universitatis Lodziensis. Folia Archaeologica, no. 20 (January 1, 1996): 111–122. Accessed December 6, 2025. https://www.czasopisma.uni.lodz.pl/archaeo/article/view/16721.