J. Löwgren. (2008)This is an electronic document. Date of publication: June 10, 2008. Date retrieved: October 3, 2009. Date last modified: September 4, 2009.
A. Dattolo, F. Ferrara, und C. Tasso. Proc. of the 3rd International Conference on Human System Interaction - HSI'2010, Seite 548-555. Rzeszow, Poland, IEEE press, (Mai 2010)
A. van Lamsweerde. Proceedings of the 16th ACM SIGSOFT International Symposium on Foundations of software engineering, Seite 238--249. New York, NY, USA, ACM, (2008)
M. Ebner, M. Schiefner, und W. Nagler. Offener Bildungsraum Hochschule. Freiheiten und Notwendigkeiten - Tagungsband der GMW-Jahrestagung 2008, Waxmann, Münster, New York, München, Berlin, (2008)
Y. Sure, S. Bloehdorn, P. Haase, J. Hartmann, und D. Oberle. Proceedings of the 12th Portuguese Conference on Artificial Intelligence - Progress in Artificial Intelligence (EPIA 2005), Volume 3803 von LNCS, Seite 218 - 231. Covilha, Portugal, Springer, (Dezember 2005)
D. Ratiu, M. Feilkas, und J. Jürjens. Proc. of the 12th European Conf. on Software Maintenance and Reengineering, Seite 203--212. IEEE Computer Society, (2008)