Asatryan, H.A., and T.V. Sargsyan. “SOME PROPERTIES OF GENERALIZED EIGENFUNCTIONS OF ONE CLASS OF DIFFERENTIAL OPERATORS”. Proceedings of the YSU A: Physical and Mathematical Sciences 46, no. 1 (227) (March 6, 2012): 3–9. Accessed September 19, 2024. https://pub.ysu.am/index.php/proceedings-phys-math/article/view/vol46_no1_2012_pp003-009.