MALIARCHUK, O. ., and V. . SABADUKHA. “YAROSLAV FEDORUK’S SCIENTIFIC AND ADMINISTRATIVE ACTIVITIES UNDER THE CONDITIONS OF THE CRISIS OF THE SOVIET SYSTEM (1960 – 1980s)”. EAST EUROPEAN HISTORICAL BULLETIN, no. 29, Dec. 2023, pp. 163-72, doi:10.24919/2519-058X.29.292937.