1. IBM WebSphere Business Modeler,
http://www.ibm.com/software/integration/wbimodeler/
2. Lecture Notes in Computer Science;M. Alanen,2003
3. Bottoni, P., Schürr, A., Taentzer, G.: Efficient Parsing of Visual Languages based on Critical Pair Analysis and Contextual Layered Graph Transformation. In: VL 2000, pp. 59–60. IEEE Computer Society, Los Alamitos (2000)
4. Lecture Notes in Computer Science;A. Cicchetti,2008
5. Foundations;A. Corradini,1997