Gordevskyy, V. D. “V. D. Gordevskyy. On His 70th Birthday.”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics, Vol. 91, June 2020, pp. 45-46, doi:10.26565/2221-5646-2020-91-04.