@article{DAN_1991_318_4_a17,
     author = {A. M. Krasnosel'skii},
     title = {On the occurrence of large-amplitude oscillatory regimes in},
     journal = {Doklady Akademii Nauk},
     pages = {844--848},
     publisher = {mathdoc},
     volume = {318},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_4_a17/}
}