“Everyday life of the academic emigration in Sofia in 1920s-1940s: private correspondence as a source for the reconstruction of M. G. Popruzhenko’s biography”, АП, vol. 19, no. 1, pp. 133–141, Dec. 2017, Accessed: Oct. 25, 2026. Available: https://periodicals.karazin.ua/apvvi/article/view/9885