%0 Journal Article %A Marinoschi Gabriela %T A free boundary problem describing the saturated-unsaturated flow in a porous medium. II: Existence of the free boundary in the 3D case. %J Abstract and Applied Analysis %D 2005 %P 813-854 %V 2005 %N 8 %I mathdoc %U https://geodesic-test.mathdoc.fr/articles/10.1155/AAA.2005.813/ %R 10.1155/AAA.2005.813 %G en %F 10_1155_AAA_2005_813