HARUTYUNYAN, T.N. LETTER TO THE EDITORIAL BOARD. Proceedings of the YSU A: Physical and Mathematical Sciences, Yerevan, Armenia, v. 49, n. 2 (237), p. 66, 2015. DOI: 10.46991/PSYU:A/2015.49.2.066. Disponível em: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol49_no2_2015_pp066. Acesso em: 19 may. 2024.