Ralph Depke Reiko Heckel Jochen Malte Küster Agent-Oriented Modeling with Graph Transformation. 105-120 http://link.springer.de/link/service/series/0558/bibs/1957/19570105.htm 2000 conf/aose/2000 AOSE db/conf/aose/aose2000.html#DepkeHK00