@article{DE_1972_8_4_a21,
     author = {A. Z. Samuilov},
     title = {A certain application of {Picard's} theorem to higher order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {734--736},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_4_a21/}
}