@article{ZVMMF_1978_18_1_a19,
     author = {L. N. \v{S}ablickaja},
     title = {Determination of the periodic solutions of differential equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {223--226},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1978_18_1_a19/}
}