A. Dattolo, F. Ferrara, und C. Tasso. Proc. of the 3rd International Conference on Human System Interaction - HSI'2010, Seite 548--555. IEEE Press, (Mai 2010)
F. Limpens, F. Gandon, und M. Buffa. Automated Software Engineering - Workshops, 2008. ASE Workshops 2008. 23rd IEEE/ACM International Conference on(September 2008)