Conceptual Models for Metadata Integration and Architecture Evolution. - Christian Lettner; Christian Hawel; Bernhard Freudenthaler; Ewald Draxler (KEOD, 2010)

Maintaining and Analyzing Production Process Definitions Using a Tree-Based Similarity Measure. - Reinhard Stumptner; Christian Lettner; Bernhard Freudenthaler; Josef Pichler; Wilhelm Kirchmayr; Ewald Draxler (ICCBR, 2015)