Hereditary artinian rings of finite representation type
In: Representation Theory II. Proceedings of the Second International Conference on Representations of Algebras, Ottawa, Carleton University, August 13-25, 1979: No. 2, Jg. 832, S. 232-241The Hochschild cocycle corresponding to a long exact sequence
In: Tsukuba Journal of Mathematics, Jg. 14 H. 2, S. 489-496