Enrico Biermann Karsten Ehrig Christian Köhler Günter Kuhns Gabriele Taentzer Eduard Weiss EMF Model Refactoring based on Graph Transformation Concepts. 2006 3 ECEASST http://eceasst.cs.tu-berlin.de/index.php/eceasst/article/view/34 db/journals/eceasst/eceasst3.html#BiermannEKKTW06