WIEWIÓRA, Marcin and MOMOT, Agata. The Oldest Teutonic Knights City in Chelmno Land. New Sources and Perspectives of Research of the 13th Centuries Chelmno City. Acta Universitatis Nicolai Copernici Archeologia. Online. 31 December 2023. Vol. 39, p. 131–151. [Accessed 8 July 2025]. DOI 10.12775/AUNC_ARCH.2023.004.