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@article{MS_1987__174_1_a3, author = {{\CYRB}.{\CYRM}. {\CYRL}{\cyre}{\cyrv}{\cyri}{\cyrt}{\cyra}{\cyrn}}, title = {{\CYRO}{\cyrb} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyra}{\cyrh} {{\CYRSH}{\cyrt}{\cyru}{\cyrr}{\cyrm}{\cyra}-{\CYRL}{\cyri}{\cyru}{\cyrv}{\cyri}{\cyrl}{\cyrl}{\cyrya}} {\cyrn}{\cyra} {\cyrv}{\cyrs}{\cyre}{\cyrishrt} {\cyrp}{\cyrr}{\cyrya}{\cyrm}{\cyro}{\cyrishrt} {\cyrs} {\cyro}{\cyrd}{\cyri}{\cyrn}{\cyra}{\cyrk}{\cyro}{\cyrv}{\cyrery}{\cyrm} {\cyrd}{\cyri}{\cyrs}{\cyrk}{\cyrr}{\cyre}{\cyrt}{\cyrn}{\cyrery}{\cyrm} {\cyrs}{\cyrp}{\cyre}{\cyrk}{\cyrt}{\cyrr}{\cyro}{\cyrm}}, journal = {Matemati\v{c}eskij sbornik}, pages = {73--103}, publisher = {mathdoc}, volume = {174}, number = {1}, year = {1987}, zbl = {0625.34021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1987__174_1_a3/} }
Б.М. Левитан. Об операторах Штурма-Лиувилля на всей прямой с одинаковым дискретным спектром. Matematičeskij sbornik, Tome 174 (1987) no. 1, pp. 73-103. http://geodesic.mathdoc.fr/item/MS_1987__174_1_a3/