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@article{MI_1968__3_1_188897, author = {{\CYRO}.{\CYRI}. {\CYRS}{\cyro}{\cyrishrt}{\cyrb}{\cyre}{\cyrl}{\cyrsftsn}{\cyrm}{\cyra}{\cyrn}}, title = {{\CYRO} {\cyrs}{\cyrl}{\cyra}{\cyrb}{\cyrery}{\cyrh} {\cyrv}{\cyro}{\cyrz}{\cyrm}{\cyru}{\cyrshch}{\cyre}{\cyrn}{\cyri}{\cyrya}{\cyrh} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyro}{\cyrv}}, journal = {Matemati\v{c}eskie issledovani\^a}, pages = {123--137}, publisher = {mathdoc}, volume = {3}, number = {1}, year = {1968}, zbl = {0234.47007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MI_1968__3_1_188897/} }
О.И. Сойбельман. О слабых возмущениях операторов. Matematičeskie issledovaniâ, Tome 3 (1968) no. 1, pp. 123-137. http://geodesic.mathdoc.fr/item/MI_1968__3_1_188897/