@article{DE_1973_9_12_a4,
     author = {S. Yu. Pilyugin},
     title = {The structure of the boundary of the characteristic set of a structurally stable three-dimensional dissipative system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2152--2161},
     publisher = {mathdoc},
     volume = {9},
     number = {12},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_12_a4/}
}