Waga, Leszek. “Integration of Pedagogical Knowledge in the Light of Questions about the Empirical Foundations of General Pedagogy and Understanding of the Concept of Generality”. Paedagogia Christiana 42, no. 2 (December 28, 2018): 65–83. Accessed April 14, 2025. https://apcz.umk.pl/PCh/article/view/PCh.2018.016.