ZELLMA, A. Online Research for the Benefit of Polish Theoretical and Practical Catechetics. Studia Warmińskie, [S. l.], v. 56, p. 213–226, 2019. DOI: 10.31648/sw.2815. Disponível em: https://czasopisma.uwm.edu.pl/index.php/sw/article/view/2815. Acesso em: 3 may. 2024.