Geodesic
Singularities of vector fields on a plane
Funkcionalʹnyj analiz i ego priloženiâ, Tome 11 (1977) no. 4, pp. 72-73 
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/
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Arnold V.I., UMN, XXVII:5 (1972), 119–184 | MR

[2] Bogdanov R.I., Funkts. analiz, 10:4 (1976), 81–82 | MR | Zbl

[3] Bogdanov R.I., Funkts. analiz, 11:1 (1977), 57–58 | MR | Zbl

[4] Bryuno A.D., Trudy Mosk. matem. o-va, XXV, 1971, 119–262 ; XXVI, 1972, 199–238

[5] Godeman R., Algebraicheskaya topologiya i teoriya puchkov, IL, M., 1961

[6] Malgranzh B., Idealy differentsiruemykh funktsii, Mir, M., 1968