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@article{DAN_1973_208_6_a2, author = {G. G. Kazaryan}, title = {Comparison of differential operators, and differential operators of constant strength}, journal = {Doklady Akademii Nauk}, pages = {1272--1275}, publisher = {mathdoc}, volume = {208}, number = {6}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a2/} }
G. G. Kazaryan. Comparison of differential operators, and differential operators of constant strength. Doklady Akademii Nauk, Tome 208 (1973) no. 6, pp. 1272-1275. http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a2/