Hölscher, K.; Klempien-Hinrichs, R.; Knirsch, P.
        
        Undecidable Control Conditions in Graph Transformation Units
        In: Moreira Martins, A.; Ribeiro, L. (eds.): Proceedings of the Brazilian Symposium on Formal Methods (SBMF 2006). Elsevier, 2006, pp. 95-111
        
        (Workgroups: 
Theoretical Computer Science, 
BIBA, 
IGS)