Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1964__106_2_a8, author = {{\CYRN}.{\CYRV}. {\CYRE}{\cyrf}{\cyri}{\cyrm}{\cyro}{\cyrv}}, title = {{\CYRV}{\cyro}{\cyrz}{\cyrn}{\cyri}{\cyrk}{\cyrn}{\cyro}{\cyrv}{\cyre}{\cyrn}{\cyri}{\cyre} {\cyro}{\cyrs}{\cyro}{\cyrb}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyre}{\cyrishrt} {\cyrn}{\cyra} {\cyrp}{\cyro}{\cyrv}{\cyre}{\cyrr}{\cyrh}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyrya}{\cyrh} {\cyro}{\cyrt}{\cyrr}{\cyri}{\cyrc}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrishrt} {\cyrk}{\cyrr}{\cyri}{\cyrv}{\cyri}{\cyrz}{\cyrn}{\cyrery}}, journal = {Matemati\v{c}eskij sbornik}, pages = {286--320}, publisher = {mathdoc}, volume = {106}, number = {2}, year = {1964}, zbl = {0126.37402}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1964__106_2_a8/} }
Н.В. Ефимов. Возникновение особенностей на поверхностях отрицательной кривизны. Matematičeskij sbornik, Tome 106 (1964) no. 2, pp. 286-320. http://geodesic.mathdoc.fr/item/MS_1964__106_2_a8/