[Robert Frost: The Oxford History of Poland-Lithuania, Volume I: The Making of the Polish-Lithuanian Union, 1385-1569] - Choińska-Mika, Jolanta (. Parliaments, estates & representation. - Abingdon : Routledge, Taylor & Francis Group, 1981-. - Online-Ressource. - ISSN 1947-248X 39, 2019)