A. Nolte, and M. Prilla. Collaboration and Technology: 18th International Conference, CRIWG 2012, Raesfeld, Germany, volume 7493 of Lecture Notes in Computer Science, Springer, Heidelberg, (2012)
C. Decker, T. Riedel, M. Beigl, L. de Souza, P. Spiess, J. Müller, and S. Haller. Proceedings of the 3rd IET International Conference on Intelligent Environments (IE 07), Ulm, Germany, page 40--47. Institution of Engineering and Technology (IET), London, (2007)
J. Eder, H. Pichler, W. Gruber, and M. Ninaus. Business Process Management, volume 2678 of Lecture Notes in Computer Science, page 216-231. Springer, (2003)