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@article{MS_1987__171_4_a0, author = {{\CYRV}.{\CYRS}. {\CYRB}{\cyre}{\cyrl}{\cyro}{\cyrn}{\cyro}{\cyrs}{\cyro}{\cyrv}}, title = {{\CYRI}{\cyrn}{\cyrd}{\cyre}{\cyrk}{\cyrs}{\cyrery} {\cyrn}{\cyre}{\cyru}{\cyrs}{\cyrt}{\cyro}{\cyrishrt}{\cyrch}{\cyri}{\cyrv}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrd}{\cyri}{\cyrf}{\cyrf}{\cyre}{\cyrr}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyro}{\cyrv}}, journal = {Matemati\v{c}eskij sbornik}, pages = {494--513}, publisher = {mathdoc}, volume = {171}, number = {4}, year = {1987}, zbl = {0629.35053}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1987__171_4_a0/} }
В.С. Белоносов. Индексы неустойчивости дифференциальных операторов. Matematičeskij sbornik, Tome 171 (1987) no. 4, pp. 494-513. http://geodesic.mathdoc.fr/item/MS_1987__171_4_a0/