%0 Journal Article %A H.W. Alt %T Numerical Solution of Steady-State Porous Flow Free Boundary Problems. %J Numerische Mathematik %D 1980 %P 73-98 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1980__36_132691/ %F NUMA_1980__36_132691