Voir la notice de l'article provenant de la source Math-Net.Ru
@article{FAA_1977_11_4_a9, author = {R. I. Bogdanov}, title = {Singularities of vector fields on a plane}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {72--73}, publisher = {mathdoc}, volume = {11}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1977_11_4_a9/} }
R. I. Bogdanov. Singularities of vector fields on a plane. Funkcionalʹnyj analiz i ego priloženiâ, Tome 11 (1977) no. 4, pp. 72-73. http://geodesic.mathdoc.fr/item/FAA_1977_11_4_a9/