@article{VMUMM_1988_4_a10,
     author = {V. V. Filippov},
     title = {Two remarks on the theory of spaces of solutions of ordinary differential equations},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {53--55},
     year = {1988},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_4_a10/}
}