@article{DAN_1960_131_5_a8,
     author = {V. A. Pliss},
     title = {On invariant surfaces of a system of two differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {1022--1024},
     publisher = {mathdoc},
     volume = {131},
     number = {5},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_5_a8/}
}