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@article{DAN_1992_323_3_a9, author = {V. A. Malyshev}, title = {Differential inequalities and the {Hadamard} conjecture}, journal = {Doklady Akademii Nauk}, pages = {420--422}, publisher = {mathdoc}, volume = {323}, number = {3}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1992_323_3_a9/} }
V. A. Malyshev. Differential inequalities and the Hadamard conjecture. Doklady Akademii Nauk, Tome 323 (1992) no. 3, pp. 420-422. http://geodesic.mathdoc.fr/item/DAN_1992_323_3_a9/