Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1949__66_2_a0, author = {{\CYRL}.{\CYRS}. {\CYRP}{\cyro}{\cyrn}{\cyrt}{\cyrr}{\cyrya}{\cyrg}{\cyri}{\cyrn}}, title = {{\CYRV}{\cyre}{\cyrk}{\cyrt}{\cyro}{\cyrr}{\cyrn}{\cyrery}{\cyre} {\cyrp}{\cyro}{\cyrl}{\cyrya} {\cyrn}{\cyra} {\cyrm}{\cyrn}{\cyro}{\cyrg}{\cyro}{\cyro}{\cyrb}{\cyrr}{\cyra}{\cyrz}{\cyri}{\cyrya}{\cyrh}}, journal = {Matemati\v{c}eskij sbornik}, pages = {129--162}, publisher = {mathdoc}, volume = {66}, number = {2}, year = {1949}, zbl = {0037.10501}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1949__66_2_a0/} }
Л.С. Понтрягин. Векторные поля на многообразиях. Matematičeskij sbornik, Tome 66 (1949) no. 2, pp. 129-162. http://geodesic.mathdoc.fr/item/MS_1949__66_2_a0/