TY - JOUR AU - R. W. Sandoval TI - Partial differential equations with non-homogeneous boundary conditions JO - Revista colombiana de matematicas PY - 1969 SP - 1 EP - 21 VL - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_1969__3_181570/ ID - RCM_1969__3_181570 ER -