@article{DAN_1982_264_4_a2,
     author = {A. N. Bautin},
     title = {On bifurcations in the splitting of a complex equilibrium state with two zero roots into simple states},
     journal = {Doklady Akademii Nauk},
     pages = {784--787},
     publisher = {mathdoc},
     volume = {264},
     number = {4},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_264_4_a2/}
}