Witteborg, Heiko and Charfi, Anis and Aly, Mohamed and Holmes, Ta'id (2012):
Business process extensions as first-class entities — a model-driven and aspect-oriented approach.
In: ICSOC'12, In: Proceedings of the 10th international conference on Service-Oriented Computing, Berlin, Heidelberg, Springer-Verlag, In: 10th international conference on Service-Oriented Computing, Shanghai, China, 12th - 15th November, 2012, pp. 763-770, [Online-Edition: http://dx.doi.org/10.1007/978-3-642-34321-6_60],
[Conference or Workshop Item]

Charfi, Anis and Schmeling, Benjamin and Novelli, Francesco and Witteborg, Heiko and Kylau, Uwe (2010):
An Overview of the Unified Service Description Language.
In: Proceedings of the 8th IEEE European Conference on Web Services (ECOWS 2010), In: 8th IEEE European Conference on Web Services (ECOWS 2010), Ayia Napa, Cyprus, pp. 173-180, [Online-Edition: http://www.computer.org/portal/web/csdl/doi/10.1109/ECOWS.20...],
[Conference or Workshop Item]