00786nam0-22002411i-450-990001207960403321000120796FED01000120796(Aleph)000120796FED0100012079620000920d1988----km-y0itay50------baengAlgebra: some current trendsProceedings o f the 5th national school in algebra held i n Varna, Bulgaria, Sept. 24-Oct. 4,1986E ds. L.L. Avramov, K.B. Tchakerian.Berlin [etc.]Springer-Verlag1988Lecture Notes in Mathematics1352ITUNINARICAUNIMARCBK990001207960403321C-20-(13525054MA1MA1Algebra some current trends262243UNINAING01