@article{DE_2005_41_1_a9,
     author = {A. F. Filippov},
     title = {Uniqueness of the solution of a system of differential equations unsolved for the derivatives},
     journal = {Differencialʹnye uravneni\^a},
     pages = {87--92},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_1_a9/}
}