TY - JOUR AU - Jorge M. Ramirez TI - Green's Functions for Sturm-Liouville Problems on Directed Tree Graphs JO - Revista colombiana de matematicas PY - 2012 SP - 15 EP - 25 VL - 46 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2012_46_1_a1/ ID - RCM_2012_46_1_a1 ER -