Tumanyan, A.G. “ON NOETHERICITY AND INDEX OF DIFFERENTIAL OPERATORS IN ANISOTROPIC WEIGHTED SOBOLEV SPACES”. Proceedings of the YSU A: Physical and Mathematical Sciences 50, no. 3 (241) (October 26, 2016): 63–69. Accessed November 23, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol50_no3_2016_pp063-069.