Grabarczyk, Tadeusz, Jarosław Kita, Magdalena Pogońska-Pol, and Myroslav Voloshchuk, eds. “Non-Dynastic Elites of the Ruthenian (?) Origin in the Military Service of the Piasts of the End of the 12th – the First Half of the 14th Century. Some Anthroponymical Observations”. In Narzędzia Wojny, 8:37–53. Faces of war. Poland: Lodz University Press, 2023. Accessed January 20, 2026. https://www.press.uni.lodz.pl/index.php/wul/catalog/book/583/chapter/1565.