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@article{TRSPY_1969_105_a6, author = {I. A. Kipriyanov}, title = {Garding's inequality for degenerate elliptic operators, and its applications}, journal = {Informatics and Automation}, pages = {77--88}, publisher = {mathdoc}, volume = {105}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1969_105_a6/} }
I. A. Kipriyanov. Garding's inequality for degenerate elliptic operators, and its applications. Informatics and Automation, Investigations in the theory of differentiable functions of many variables and its applications. Part III, Tome 105 (1969), pp. 77-88. http://geodesic.mathdoc.fr/item/TRSPY_1969_105_a6/