ACTA MATHEMATICA HUNGARICA, vol.91, no.3, pp.253-261, 2001 (SCI-Expanded)
The notion of circle plus -supplemented modules is a proper generalization of lifting modules. As a proper generalization of circle plus -supplemented modules, we introduce (D-12)-modules and obtain some properties, characterizations and decompositions of circle plus -supplemented modules and (D-12)-modules.