00915nam0-22002771i-450-990001175950403321000117595FED01000117595(Aleph)000117595FED0100011759520000920d1975----km-y0itay50------baengTrivial Extensions of Abelian Categories Homological Algebra of Trivial Extensions of Abelian Categories with Applications to Ring Theoryby FOSSUM, GRIFFITH, and REITEN .Berlin [etc.]Springer-Verlag1975Lecture Notes in Mathematics456Fossum,Robert M.55673Griffith,Phillip A.Reiten,IdunITUNINARICAUNIMARCBK990001175950403321C-20-(45616591MA1MA1Trivial extensions of Abelian categories262789UNINAING01