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@article{DAN_1964_155_2_a4, author = {Yu. I. Lyubich}, title = {Density conditions on the initial manifold for the abstract {Cauchy} problem}, journal = {Doklady Akademii Nauk}, pages = {262--265}, publisher = {mathdoc}, volume = {155}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a4/} }
Yu. I. Lyubich. Density conditions on the initial manifold for the abstract Cauchy problem. Doklady Akademii Nauk, Tome 155 (1964) no. 2, pp. 262-265. http://geodesic.mathdoc.fr/item/DAN_1964_155_2_a4/