Alyabieva Валентина Георгиевна. “International Congress of Mathematics. CHICAGO. 1893”. BULLETIN OF PERM UNIVERSITY. MATHEMATICS. MECHANICS. COMPUTER SCIENCE, no. 1(52) (December 13, 2021): 89–97. Accessed May 18, 2024. http://press.psu.ru/index.php/Math/article/view/5038.