Kwiatek, A. 2024. The ‘Useful Man’ in the Political System of the Polish-Lithuanian Commonwealth of the Vasas – New Perspectives and Methodological Problems in Research into the Careers of Małopolska Noblemen. Kwartalnik Historyczny. 130, 7 (May 2024), 117–138. DOI:https://doi.org/10.12775/KH.2023.130.SI.1.04.