EditorialBoard. (2017). Mykhailo Pylypovych Kravchuk (27.09.1892 – 09.03.1942), famous ukrainian mathematician (on the 125th anniversary of his birth). Ukrains’kyi Matematychnyi Zhurnal, 69(9), 1265-1269. Retrieved from http://umj.imath.kiev.ua/index.php/umj/article/view/1777