The module theoretical approach to quasi-hereditary algebras
In: Representations of Algebras and Related Topics, Jg. 168, S. 200-224
A module theoretical interpretation of properties of the root systems
In: Ring theory. Proceedings of the 1978 Antwerp Conference, Jg. 51, S. 435-451Modules of bounded length in Auslander-Reiten components
In: Archiv der Mathematik, Jg. 50 H. 2, S. 128-133Monofunctors as reflectors
In: Transactions of the American Mathematical Society, Jg. 161, S. 293-306