Podhájecká, Mária, and Vladimír Gerka. “Historical Context of Pre-School Age in the Work of Comenius and Osvald As the Message for Present Education”. KULTURA – PRZEMIANY – EDUKACJA 1 (December 24, 2013): 46–59. Accessed December 5, 2025. https://journals.ur.edu.pl/kpe/article/view/11023.