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@article{DAN_1960_132_3_a9, author = {A. S. Markus}, title = {basis from root vectors of a dissipative operator}, journal = {Doklady Akademii Nauk}, pages = {524--527}, publisher = {mathdoc}, volume = {132}, number = {3}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_3_a9/} }
A. S. Markus. basis from root vectors of a dissipative operator. Doklady Akademii Nauk, Tome 132 (1960) no. 3, pp. 524-527. http://geodesic.mathdoc.fr/item/DAN_1960_132_3_a9/