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@article{DAN_1968_179_5_a4, author = {G. M. Vainikko}, title = {Similar operators}, journal = {Doklady Akademii Nauk}, pages = {1029--1031}, publisher = {mathdoc}, volume = {179}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a4/} }
G. M. Vainikko. Similar operators. Doklady Akademii Nauk, Tome 179 (1968) no. 5, pp. 1029-1031. http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a4/