@article{DE_1978_14_11_a5,
     author = {S. Yu. Pilyugin and V. A. Pliss},
     title = {The boundary of a stable invariant set of the {Morse--Smale} system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1997--2001},
     publisher = {mathdoc},
     volume = {14},
     number = {11},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_11_a5/}
}