@article{FAA_1976_10_4_a0,
     author = {V. I. Arnol'd},
     title = {Bifurcations of invariant manifolds of differential equations and normal forms in neighborhoods of elliptic curves},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1976_10_4_a0/}
}