@unpublished{TUW-140042, author = {Hofreiter, Birgit and Huemer, Christian and Liegl, Philipp and Schuster, Rainer and Zapletal, Marco}, title = {UMM Add-In: A UML Extension for UN/CEFACT's Modeling Methodology}, year = {2006}, note = {Posterpr{\"a}sentation: European Conference on Model Driven Architecture (ECMDA'06), Bilbao, Spanien; 2006-07-10} }