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@article{MZM_1980_28_6_a3, author = {L. I. Vainerman}, title = {Extensions of closed operators in {Hilbert} space}, journal = {Matemati\v{c}eskie zametki}, pages = {833--842}, publisher = {mathdoc}, volume = {28}, number = {6}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a3/} }
L. I. Vainerman. Extensions of closed operators in Hilbert space. Matematičeskie zametki, Tome 28 (1980) no. 6, pp. 833-842. http://geodesic.mathdoc.fr/item/MZM_1980_28_6_a3/