1. RelView — A system for calculating with relations and relational programming;Behnke,1996
2. Relation-algebraic computation of fixed points with applications;Berghammer;Journal of Logic and Algebraic Programming,2006
3. Exact computation of minimum feedback vertex sets with relational algebra;Berghammer;Fundamenta Informaticae,2006
4. Relational-algebraic analysis of Petri nets with RelView;Berghammer,1996
5. Proceedings of the 6th International Workshop on Relational Methods in Computer Science, RelMiCS6;Berghammer,2002