@article{DAN_1957_117_2_a5,
     author = {V. A. Pliss},
     title = {An investigation of a non-linear system of three differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {184--187},
     publisher = {mathdoc},
     volume = {117},
     number = {2},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_117_2_a5/}
}