@article{DAN_1990_311_2_a1,
     author = {Ya. S. Baris and O. B. Lukova},
     title = {Integral manifolds and the reduction principle in stability},
     journal = {Doklady Akademii Nauk},
     pages = {270--273},
     publisher = {mathdoc},
     volume = {311},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_2_a1/}
}