The canonical algebras (with an appendix by W. Crawley-Boevey)
Crawley-Boevey, William ; Ringel, Claus Michael ; Balcerzyk, Stanislaw (Hrsg.)In: Topics in Algebra. 1: Rings and representations of algebras, Jg. 26,1, S. 407-4321990The category of good modules over a quasi-hereditary algebra has almost split sequences
Ringel, Claus Michael1989The category of modules with good filtrations over a quasi-heriditary algebra has almost split sequences
Ringel, Claus MichaelIn: Mathematische Zeitschrift, Jg. 208 H. 1, S. 209-2231991Eine Charakterisierung der Homotopiekategorie der CW-Komplexe
Ringel, Claus MichaelIn: Mathematische Zeitschrift, Jg. 115 H. 5, S. 359-3651970A class of balanced non-uniserial rings
Dlab, Vlastimil ; Ringel, Claus MichaelIn: Mathematische Annalen, Jg. 195 H. 2, S. 279-2911972A class of bounded hereditary noetherian domains
Dlab, Vlastimil ; Ringel, Claus MichaelIn: Journal of Algebra, Jg. 92 H. 2, S. 311-3211985Coherent tubes
d'Este, Gabriella ; Ringel, Claus MichaelIn: Journal of algebra, Jg. 87 H. 1, S. 150-2011984Commutative QF-1 rings
Ringel, Claus MichaelIn: Proceedings of the American Mathematical Society, Jg. 42 H. 2, S. 365-3681974The composition algebra of a cyclic quiver
Ringel, Claus MichaelIn: Proceedings of the London Mathematical Society : Ser. 3, Jg. 66, S. 507-5371993A construction for quasi-hereditary algebras
Dlab, Vlastimil ; Ringel, Claus MichaelIn: Compositio Mathematica, Jg. 70 H. 2, S. 155-1751989A construction of rings whose injective hulls allow a ring structure
Dlab, Vlastimil ; Ringel, Claus MichaelIn: The journal of the Australian Mathematical Society, Jg. 16 H. 01, S. 7-131973Construction of tilted algebras
Happel, Dieter ; Ringel, Claus Michael ; Auslander, Maurice (Hrsg.) ; Lluis, Emilo (Hrsg.)In: Representations of Algebras. Proceedings of the Third International Conference on Representations of Algebras, held in Puebla, Mexico, August 4 - 8, 1980, Jg. 903, S. 125-1671981