SZULAKIEWICZ, W. Profesor Karol Klemens Poznański – historyk oświaty i wychowania. Acta Universitatis Nicolai Copernici Pedagogika, [S. l.], v. 28, p. 107–122, 2012. DOI: 10.12775/AUNC_PED.2012.010. Disponível em: https://apcz.umk.pl/AUNC_PED/article/view/AUNC_PED.2012.010. Acesso em: 24 lip. 2024.