@article{EMJ_2019_10_1_a1,
     author = {A. Darbinyan and A. Tumanyan},
     title = {On index stability of {Noetherian} differential operators in anisotropic {Sobolev} spaces},
     journal = {Eurasian mathematical journal},
     pages = {9--15},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2019_10_1_a1/}
}