Holubnycha, Liudmyla, and Tetiana Besarab. “General Scientific Basics of Pedagogical History Researches”. Educational Challenges 26, no. 1 (March 31, 2021): 41-50. Accessed June 7, 2026. https://www.educationalchallenges.org.ua/index.php/education_challenges/article/view/54.