@article{SM_2002_193_2_a1,
     author = {A. I. Bulgakov and V. V. Skomorokhov},
     title = {Approximation of differential inclusions},
     journal = {Sbornik. Mathematics},
     pages = {187--203},
     year = {2002},
     volume = {193},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_2_a1/}
}