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@article{DAN_1961_141_6_a2, author = {Yu. L. Daletskii}, title = {Continual integrals and characteristics related to a group of operators}, journal = {Doklady Akademii Nauk}, pages = {1290--1293}, publisher = {mathdoc}, volume = {141}, number = {6}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_6_a2/} }
Yu. L. Daletskii. Continual integrals and characteristics related to a group of operators. Doklady Akademii Nauk, Tome 141 (1961) no. 6, pp. 1290-1293. http://geodesic.mathdoc.fr/item/DAN_1961_141_6_a2/