Peter {\O}hrstr{\o}m
and Henrik Sch{\"a}rfe
and Sara L. UckelmanProceedings of the 16th International Conference on Conceptual Structures (ICCS 2008)
74-87
(2008)
Gabriele Taentzer
and {Ren\'e} Schmutzler
and Claudia ErmelProceedings of AGTIVE 2007: Applications of Graph Transformations with Industrial Relevance
(2007)