@article{ZVMMF_1968_8_4_a12,
     author = {L. D. Akulenko},
     title = {Stationary motions in perturbed autonomous systems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {884--890},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_4_a12/}
}