Gaca, Andrzej, and Hubert Bąk. “The Kalmar Union and the Polish-Lithuanian Unions (part 1) – Origins and Causes of Establishment”. Studia Iuridica Toruniensia 30 (September 16, 2022): 127–154. Accessed April 19, 2024. https://apcz.umk.pl/SIT/article/view/39804.