共 4 条
[1]
Tam e algebras and integralquadraic form s. RingelC M. . 1984
[2]
Nonexistent cycles. Bautista R,Sm allS O. Com m Algebra . 1983
[3]
Alm ost split sequences w hose m iddle term has at m ost tw o indecom posable sum -m ands. Auslander M,Bautista R,Platzeck M I,Sm alφS O. Canadian Journal of Mathematics . 1979
[4]
Auslander-Reiten sequences w ith few m iddle term s and applications to string algebras. Butler M C R,RingelC M. Com m Algebra . 1987