Board, E. (2013) “On the meeting of the Kharkiv Mathematical Society”, Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics, 0(1061), p. 85. Available at: https://periodicals.karazin.ua/mech_math/article/view/13174 (Accessed: 24April2024).