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@article{DAN_1967_173_1_a9, author = {Yu. I. Petunin}, title = {Prenuclear mappings in scales of {Banach} and {Hilbert} spaces}, journal = {Doklady Akademii Nauk}, pages = {40--43}, publisher = {mathdoc}, volume = {173}, number = {1}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_1_a9/} }
Yu. I. Petunin. Prenuclear mappings in scales of Banach and Hilbert spaces. Doklady Akademii Nauk, Tome 173 (1967) no. 1, pp. 40-43. http://geodesic.mathdoc.fr/item/DAN_1967_173_1_a9/