@article{DAN_1987_292_5_a11,
     author = {A. M. Krasnosel'skii},
     title = {Forced oscillations in systems with hysteresis nonlinearities},
     journal = {Doklady Akademii Nauk},
     pages = {1078--1082},
     publisher = {mathdoc},
     volume = {292},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_5_a11/}
}