TY - JOUR TI - A direct proof of Noether's second isomorphism theorem for abelian categories JO - Revista colombiana de matematicas PY - 2009 SP - 35 EP - 42 VL - 43 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2009_43_1_a3/ ID - RCM_2009_43_1_a3 ER -