@article{DE_1981_17_6_a3,
     author = {I. G. Rozet},
     title = {On autonomous three-dimensional systems with knotted trajectories and limit cycles of various types},
     journal = {Differencialʹnye uravneni\^a},
     pages = {994--999},
     publisher = {mathdoc},
     volume = {17},
     number = {6},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_6_a3/}
}