“Yakov Yakovych Belen de Ballu (1753–1815) – Professor of Kharkiv University, First Librarian of the University Library. ”. 2024. V. N. Karazin Kharkiv National University Bulletin History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences 38 (June): 168-74. https://doi.org/10.26565/2227-6505-2024-38-16.