@article{DE_1985_21_12_a4,
     author = {S. N. Kirpichnikov and A. G. Stepanov},
     title = {The existence of structurally stable global oscillators in a class of sixth-order dynamical systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2057--2063},
     publisher = {mathdoc},
     volume = {21},
     number = {12},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_12_a4/}
}