@article{EJDE_2013__2013__a32,
     author = {Potapov,  Dmitriy K. and Yevstafyeva,  Victoria V.},
     title = {Lavrent'ev problem for separated flows with an external perturbation},
     journal = {Electronic journal of differential equations},
     year = {2013},
     volume = {2013},
     zbl = {1290.35134},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a32/}
}