- Conceptual Modelling and Its Theoretical Foundations, volume 7260 of Lecture Notes in Computer Science, page 197-215. Springer, (2012)
- The Evolution of Conceptual Modeling, volume 6520 of Lecture Notes in Computer Science, page 254-284. Springer, (2008)
- Business Process Management Workshops 1, volume 99 of Lecture Notes in Business Information Processing, page 280-292. Springer, (2011)
- IACR Cryptology ePrint Archive (2002)
- IACR Cryptology ePrint Archive (2002)
- iiWAS, page 182-188. ACM, (2011)
- Die Verwaltung (1995)
- DÖV Zeitschrift für öffentliches Recht und Verwaltungswissenschaft/Beiheft (1995)
- Zeitschrift für Umweltrecht - das Forum für Umwelt- und Planungsrecht (2009)
- Zeitschrift für neues Energierecht (2008)
- IACR Cryptology ePrint Archive (2005)
- ACM Multimedia, page 237-238. ACM Press, (1995)
- ACM Multimedia, page 545-546. ACM Press, (1995)
- CoRR (1996)
- Computers & Geosciences 35(7):1409-1414 (2009)
- IEEE Transactions on Visualization and Computer Graphics TVCG (2012)
- Geometric Algebra Computing, Springer, (2010)
- ER Workshops, volume 6999 of Lecture Notes in Computer Science, page 271-280. Springer, (2011)
- Int. J. Web Eng. Technol. 1(1):79-111 (2003)
- JSW 2(4):1-11 (2007)


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