KAKOVKINA, Olga M.. Diplomatic Activity of the People’s Republic of Bulgaria in Ukraine on the basis of the Central State Archives of Public Organizations of Ukraine (TsDAGO). Universum Historiae et Archeologiae = The Universe of History and Archeology = Універсум історії та археології = Универсум истории и археологии ISSN 2664-9950 (Print) ISSN 2707-6385 (Online), [S.l.], v. 1, n. 1-2, p. 68–80, dec. 2019. ISSN 2707-6385. Available at: <http://uha.dp.ua/index.php/UHA/article/view/17>. Date accessed: 29 nov. 2021. doi: https://doi.org/10.15421/2611809.