%0 Journal Article %A J. Goncerzewicz %T On the existence of the weak solution of a boundary value problem arising in the theory of water percolation %J Applicationes Mathematicae %D 1977 %P 647-656 %V 16 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-16-4-647-656/ %R 10.4064/am-16-4-647-656 %G en %F 10_4064_am_16_4_647_656