Górski, K. (2020). The International Conference “Unions of States in the Past. Theory and Practice” (Jagiellonian University, Kraków, September 20, 2019). Krakowskie Studia z Historii Państwa i Prawa, 2020, 111-112. doi: https://doi.org/10.4467/20844131KS.20.010.11776