“Mykola Sumtsov’s Contribution to the Study of Pysankas”. V. N. Karazin Kharkiv National University Bulletin History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences 38 (June 23, 2024): 159–167. Accessed October 25, 2026. https://periodicals.karazin.ua/uahistory/article/view/23629.