@article{DAN_1984_275_1_a1,
     author = {A. I. Vagabov},
     title = {A theorem on multiple completeness for ordinary differential},
     journal = {Doklady Akademii Nauk},
     pages = {13--17},
     year = {1984},
     volume = {275},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_1_a1/}
}