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@article{DAN_1987_293_6_a2, author = {S. Z. Levendorskii}, title = {On generalizations of the {Weyl} formula for degenerate operators}, journal = {Doklady Akademii Nauk}, pages = {1297--1301}, publisher = {mathdoc}, volume = {293}, number = {6}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a2/} }
S. Z. Levendorskii. On generalizations of the Weyl formula for degenerate operators. Doklady Akademii Nauk, Tome 293 (1987) no. 6, pp. 1297-1301. http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a2/