Pytel, Marcin. “A Forgery of a Document from 1150 and Its Transumpt from 1251 ”. Czasopismo Prawno-Historyczne 73, no. 1 (June 30, 2021): 129–144. Accessed July 18, 2024. https://pressto.amu.edu.pl/index.php/cph/article/view/28693.