@article{DAN_1985_285_5_a12,
     author = {V. V. Filippov},
     title = {On the theory of spaces of solutions of ordinary differential},
     journal = {Doklady Akademii Nauk},
     pages = {1073--1077},
     publisher = {mathdoc},
     volume = {285},
     number = {5},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_285_5_a12/}
}