Sudoł-Procyk, Magdalena, Maciej Krajcarz, Magdalena Malak, and Dagmara H. Werra. 2021. “Preliminary Characterization of the Prehistoric Mine of Chocolate Flint in Poręba Dzierżna, Site 24 (Wolbrom Commune, Lesser Poland Voivodeship)”. Sprawozdania Archeologiczne 73 (2). https://doi.org/10.23858/SA/73.2021.2.2546.