Gregor Engels Anneke Kleppe Arend Rensink Maria Semenyak Christian Soltenborn Heike Wehrheim From UML Activities to TAAL - Towards Behaviour-Preserving Model Transformations. 94-109 2008 ECMDA-FA http://dx.doi.org/10.1007/978-3-540-69100-6_7 conf/ecmdafa/2008 db/conf/ecmdafa/ecmdafa2008.html#EngelsKRSSW08