%0 Journal Article %A Santos, Lisa %T A diffusion problem with gradient constraint and evolutive Dirichlet condition %J Portugaliae mathematica %D 1991 %P 441-468 %V 48 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1991__48_4_115769/ %G en %F PORMA_1991__48_4_115769