TY - JOUR AU - Ruyun Ma TI - Existence of positive solutions for second order $m$-point boundary value problems JO - Annales Polonici Mathematici PY - 2002 SP - 265 EP - 276 VL - 79 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap79-3-4/ DO - 10.4064/ap79-3-4 LA - en ID - 10_4064_ap79_3_4 ER -