@article{DAN_1974_217_1_a4,
     author = {B. A. Ryabov and G. P. Sachkov},
     title = {On the structural stability of invariant systems},
     journal = {Doklady Akademii Nauk},
     pages = {24--26},
     publisher = {mathdoc},
     volume = {217},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_217_1_a4/}
}