@article{FAA_1979_13_1_a8,
     author = {R. I. Bogdanov},
     title = {Versal deformations of singular points of vector fields on a plane},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {63--64},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1979_13_1_a8/}
}