@article{MZM_1980_27_2_a10,
     author = {A. F. Filippov},
     title = {A system of differential equations with some discontinuous functions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {255--266},
     year = {1980},
     volume = {27},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1980_27_2_a10/}
}