The braid group action on the set of exceptional sequences of a hereditary artin algebra
In: Abelian group theory and related topics: Conference on Abelian Groups, August 1 - 7, 1993, Oberwolfach, Germany, Jg. 171, S. 339-3521994
Kawada's theorem
In: Abelian Group Theory. Proceedings of the Oberwolfach Conference, January 12–17, 1981, Jg. 874, S. 431-446