Ratajczak, K. 2018. Apostolic Legates in Poland in the Middle Ages and Their Role in Adopting Particular Ecclesiastical Legislation by the Polish Church – Educational Aspects. Biuletyn Historii Wychowania. 38 (lis. 2018), 53–65. DOI:https://doi.org/10.14746/bhw.2018.38.22.