Hartmut Ehrig Karsten Ehrig Claudia Ermel Ulrike Prange Consistent Integration of Models Based on Views of Visual Languages. 62-76 2008 FASE http://dx.doi.org/10.1007/978-3-540-78743-3_5 conf/fase/2008 db/conf/fase/fase2008.html#EhrigEEP08