@article{DE_1966_2_4_a3,
     author = {A. S. Bakay},
     title = {Resonance phenomena in nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {479--491},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_4_a3/}
}