1. Baer, D.: Wild hereditary Artin algebras and linear methods. Manuscr. math.55, 69–82 (1986)
2. Baer, D.: A note on wild quiver algebras and tilting modules. Preprint Paderborn 1987
3. Bünermann, D.: Hereditary torsion theories and Auslander-Reiten sequences. Arch.Math.41, 304–308 (1983)
4. Dlab, V. and Ringel, C.M.: Eigenvalues of Coxeter transformations and the Gelfand-Kirillov dimension of the preprojective algebra. Proc.Amer.Math.Soc.83, 228–232 (1981)
5. Geigle, W. and Lenzing, H.: Perpendicular categories with applications to representations and sheaves. Preprint Paderborn 1988