Chernyavskyi, G. 2023. Known in Europe, Unknown in Bulgaria (To the 150th Anniversary of the Birth of Christian Rakovsky). The Journal of V. N. Karazin Kharkiv National University. Series History. 64 (Dec. 2023), 87-109. DOI:https://doi.org/10.26565/2220-7929-2023-64-04.