Suchodolski, Stanisław, and Jacek Szolc. “The Discovery of New Die Chains of Bolesław the Brave’s Coinage and Their Results. An Unknown Hoard from Geiseltal Near Merseburg”. Wiadomości Numizmatyczne 68, no. 212 (December 27, 2024): 163–177. Accessed April 2, 2025. https://journals.iaepan.pl/wn/article/view/4078.