R. Depke, G. Engels, and J. Küster, On the Integration of Roles in the UML. University of Paderborn, Department of Computer Science, 2000.
LibreCat: /record/8207

R. Depke, R. Heckel, and J. Küster, Modeling Agent-Based Systems with Graph Transformation. University of Paderborn, Department of Computer Science, 2000.
LibreCat: /record/8208

G. Engels, R. Hücking, S. Sauer, and A. Wagner, UML Collaboration Diagrams and Their Transformation to Java. University of Paderborn, Department of Computer Science, 1999.
LibreCat: /record/8204

M. Andries et al., Graph Transformation for Specification and Programming. University of Bremen, Department of Mathematics and Computer Science, 1996.
LibreCat: /record/8197

U. Pletat, G. Engels, and H.-D. Ehrich, Operational Semantics of Algebraic Specifications with Conditional Equations. University of Dortmund, Department of Computer Science, 1981.
LibreCat: /record/8185