TY - JOUR AU - Ecevit, Şule AU - Koşan, Muhammet Tamer TI - On rings all of whose modules are retractable JO - Archivum mathematicum PY - 2009 SP - 71 EP - 74 VL - 45 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_2009__45_1_a5/ LA - en ID - ARM_2009__45_1_a5 ER -