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@article{DAN_1961_139_2_a14, author = {A. V. Strauss}, title = {Some families of extensions of a symmetric operator}, journal = {Doklady Akademii Nauk}, pages = {316--319}, publisher = {mathdoc}, volume = {139}, number = {2}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_139_2_a14/} }
A. V. Strauss. Some families of extensions of a symmetric operator. Doklady Akademii Nauk, Tome 139 (1961) no. 2, pp. 316-319. http://geodesic.mathdoc.fr/item/DAN_1961_139_2_a14/