%0 Journal Article %A Bermúdez, A. %A Muniz, M. C. %A Quintela, P. %T Existence of solution for a free boundary problem in a nonlinear piecewise homogeneous medium %J Annales de l'I.H.P. Analyse non linéaire %D 1998 %P 399-430 %V 15 %N 4 %I Gauthier-Villars %U http://www.numdam.org/item/AIHPC_1998__15_4_399_0/ %G en %F AIHPC_1998__15_4_399_0