%0 Journal Article %A A. Darbinyan %A A. Tumanyan %T On index stability of Noetherian differential operators in anisotropic Sobolev spaces %J Eurasian mathematical journal %D 2019 %P 9-15 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2019_10_1_a1/ %G en %F EMJ_2019_10_1_a1