JEŻ, Jan. From an Enemy to a Loyal Ally, or the Relationship between Siemowit IV, Duke of Masovia, with Jadwiga of Capetian House of Anjou and Władysław Jagiełło. In: BUDZYŃSKI, Piotr; DAWCZYK, Maciej; GRYGLEWSKI, Krzysztof; ZIÓŁKOWSKI, Michał (eds.). Vade Nobiscum, tom XX/2019: Studia z historii politycznej i wojskowej. Vade NobiscumPoland: Lodz University Press,2019. p. 61–71. DOI: 10.18778/8142-717-3.04. Disponível em: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1483/chapter/4584. Acesso em: 15 feb. 2026.