@article{DE_1987_23_4_a19,
     author = {M. I. Gil'},
     title = {On conditions for the dissipativity and existence of limit cycles of differential equations with a leading linear part},
     journal = {Differencialʹnye uravneni\^a},
     pages = {712--714},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_4_a19/}
}