Kotowicz, Piotr N. “The Polish-Ruthenian Borderland in 1340 and the Fall of the „Zamczysko” Hillfort in Sanok-Biała Góra”. Fasciculi Archaeologiae Historicae 30 (November 28, 2017): 35–51. Accessed April 25, 2024. https://journals.iaepan.pl/fah/article/view/2080.