Waga L. Integration of Pedagogical Knowledge in the Light of Questions about the Empirical Foundations of General Pedagogy and Understanding of the Concept of Generality. PCh [Internet]. 2018 Dec. 28 [cited 2025 Apr. 14];42(2):65-83. Available from: https://apcz.umk.pl/PCh/article/view/PCh.2018.016