%0 Journal Article %A Dolbeault, Jean %A Monneau, Régis %T Convexity estimates for nonlinear elliptic equations and application to free boundary problems %J Annales de l'I.H.P. Analyse non linéaire %D 2002 %P 903-926 %V 19 %N 6 %I Elsevier %U http://www.numdam.org/item/AIHPC_2002__19_6_903_0/ %G en %F AIHPC_2002__19_6_903_0