Department of Mathematics and Mechanics, Editorial board “Proceedings of the YSU” Y administration,. VLADIMIR S. SARGSYAN. Proc. YSU A: Phys. Math. Sci. [Internet]. 2013 Apr. 10 [cited 2024 Sep. 19];47(1 (230):65-6. Available from: https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol47_no1_2013_pp065-066