%0 Journal Article %A Gil, O. %A QuirĂ³s, F. %T Boundary layer formation in the transition from the porous media equation to a Hele-Shaw flow %J Annales de l'I.H.P. Analyse non linĂ©aire %D 2003 %P 13-36 %V 20 %N 1 %I Elsevier %U http://www.numdam.org/item/AIHPC_2003__20_1_13_0/ %G en %F AIHPC_2003__20_1_13_0