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@article{MS_1981__156_3_a0, author = {A.A. {\CYRB}{\cyro}{\cyrr}{\cyri}{\cyrs}{\cyre}{\cyrn}{\cyrk}{\cyro}}, title = {{\CYRO} {\cyrp}{\cyro}{\cyrv}{\cyre}{\cyrr}{\cyrh}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyrya}{\cyrh} {\cyrv}{\cyrn}{\cyre}{\cyrsh}{\cyrn}{\cyre}{\cyrishrt} {\cyrn}{\cyre}{\cyrp}{\cyro}{\cyrl}{\cyro}{\cyrzh}{\cyri}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrishrt} {\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyri}{\cyrz}{\cyrn}{\cyrery} {\cyrv} {\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyra}{\cyrn}{\cyrs}{\cyrt}{\cyrv}{\cyra}{\cyrh} {\cyrp}{\cyro}{\cyrs}{\cyrt}{\cyro}{\cyrya}{\cyrn}{\cyrn}{\cyro}{\cyrishrt} {\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyri}{\cyrz}{\cyrn}{\cyrery}}, journal = {Matemati\v{c}eskij sbornik}, pages = {339--354}, publisher = {mathdoc}, volume = {156}, number = {3}, year = {1981}, zbl = {0473.53049}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1981__156_3_a0/} }
A.A. Борисенко. О поверхностях внешней неположительной кривизны в пространствах постоянной кривизны. Matematičeskij sbornik, Tome 156 (1981) no. 3, pp. 339-354. http://geodesic.mathdoc.fr/item/MS_1981__156_3_a0/