@article{DE_1997_33_8_a7,
     author = {V. V. Filippov},
     title = {On the {Dirichlet} problem for a second-order vector ordinary differential equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1057--1068},
     publisher = {mathdoc},
     volume = {33},
     number = {8},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_8_a7/}
}