1. The Cartan matrix as an indicator of finite global dimension for artinian rings;Burgess,1985
2. On the derived category of a finite dimensional algebra;Happel;Comment. Math. Helv.,1987
3. Triangulated categories in the representation theory of finite dimensional algebras;Happel,1988
4. Trivial extensions of tilted algebras;Hughes,1983
5. The Cartan map on categories of graded modules;Wilson;J. Algebra,1983