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@article{MS_1991__181_2_a0, author = {{\CYRYU}.{\CYRV}. {\CYRE}{\cyrg}{\cyro}{\cyrr}{\cyro}{\cyrv} and {\CYRV}.{\CYRA}. {\CYRK}{\cyro}{\cyrn}{\cyrd}{\cyrr}{\cyra}{\cyrt}{\cyrsftsn}{\cyre}{\cyrv}}, title = {{\CYRO}{\cyrb} {\cyro}{\cyrt}{\cyrr}{\cyri}{\cyrc}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrm} {\cyrs}{\cyrp}{\cyre}{\cyrk}{\cyrt}{\cyrr}{\cyre} {\cyrerev}{\cyrl}{\cyrl}{\cyri}{\cyrp}{\cyrt}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyro}{\cyrg}{\cyro} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyra}}, journal = {Matemati\v{c}eskij sbornik}, pages = {147--166}, publisher = {mathdoc}, volume = {181}, number = {2}, year = {1991}, zbl = {0734.35063}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1991__181_2_a0/} }
Ю.В. Егоров; В.А. Кондратьев. Об отрицательном спектре эллиптического оператора. Matematičeskij sbornik, Tome 181 (1991) no. 2, pp. 147-166. http://geodesic.mathdoc.fr/item/MS_1991__181_2_a0/