STEPAN VIDNYANSKYJ; HANNA KHARLAN. FOR THE FIFTIETH BIRTHDAY OF A DOCTOR OF HISTORY, PROFESSOR, MEMBER OF THE EDITORIAL BOARD OF OUR COLLECTION OF SCIENTIFIC PAPERS ANDRIY YURIJOVYCH MARTYNOV. International Relations of Ukraine: Scientific Searches and Findings, n. 28, p. 411-416, 5 Dec. 2019.