TY - JOUR AU - J. Goncerzewicz TI - On the existence of the weak solution of a boundary value problem arising in the theory of water percolation JO - Applicationes Mathematicae PY - 1977 SP - 647 EP - 656 VL - 16 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/am-16-4-647-656/ DO - 10.4064/am-16-4-647-656 LA - en ID - 10_4064_am_16_4_647_656 ER -