Mitropolsky YA, Kurpel NS, Luchka A, Shevelo VN. Yuri Dmitrievich Sokolov . Ukr. Mat. Zhurn. [Internet]. 1971 Feb. 23 [cited 2025 Dec. 6];23(2):281. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8516