@article{TM_1969_105_a6,
     author = {I. A. Kipriyanov},
     title = {Garding's inequality for degenerate elliptic operators, and its applications},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {77--88},
     year = {1969},
     volume = {105},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1969_105_a6/}
}