Bohdanets-Biloskalenko, Natalya. “Historiography of Ya.F.Chepyha’s Herritage”. Pedagogical Discourse0, no. 15 (October 7, 2013): 67-72. Accessed June 1, 2025. http://ojs.kgpa.km.ua/index.php/peddiscourse/article/view/594.