Maliwan TunapanChitlada SomsupSarapee ChairatMahidol University2018-08-202018-08-202006-02-01Bulletin of the Australian Mathematical Society. Vol.73, No.1 (2006), 65-68000497272-s2.0-33645324004https://repository.li.mahidol.ac.th/handle/20.500.14594/23399In this note we discuss a type of matrix ring that has nice properties concerning the injectivity and quasi-injectivity of one-sided ideals. Copyright Clearance Centre, Inc.Mahidol UniversityMathematicsArticleSCOPUS10.1017/S0004972700038624