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@article{MS_1961__97_2_a1, author = {{\CYRM}.{\CYRSH}. {\CYRB}{\cyri}{\cyrr}{\cyrm}{\cyra}{\cyrn}}, title = {{\CYRO} {\cyrs}{\cyrp}{\cyre}{\cyrk}{\cyrt}{\cyrr}{\cyre} {\cyrs}{\cyri}{\cyrn}{\cyrg}{\cyru}{\cyrl}{\cyrya}{\cyrr}{\cyrn}{\cyrery}{\cyrh} {\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyrn}{\cyrery}{\cyrh} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}}, journal = {Matemati\v{c}eskij sbornik}, pages = {125--174}, publisher = {mathdoc}, volume = {97}, number = {2}, year = {1961}, zbl = {0104.32601}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1961__97_2_a1/} }
М.Ш. Бирман. О спектре сингулярных граничных задач. Matematičeskij sbornik, Tome 97 (1961) no. 2, pp. 125-174. http://geodesic.mathdoc.fr/item/MS_1961__97_2_a1/