@article{DE_1987_23_4_a21,
     author = {G. A. Leonov and V. A. Teshev},
     title = {A frequency criterion for the stability of systems of differential equations with hysteresis functions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {718--719},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_4_a21/}
}