%0 Journal Article %A Potapov, Dmitriy K. %A Yevstafyeva, Victoria V. %T Lavrent'ev problem for separated flows with an external perturbation %J Electronic journal of differential equations %D 2013 %V 2013 %U http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a32/ %G en %F EJDE_2013__2013__a32