@article{DAN_1991_321_3_a3,
     author = {A. B. Kurzhanskii and T. F. Filippova},
     title = {The method of singular perturbations for differential inclusions},
     journal = {Doklady Akademii Nauk},
     pages = {454--459},
     publisher = {mathdoc},
     volume = {321},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_3_a3/}
}