H. Klus, D. Niebuhr, und A. Rausch. Proceedings of the International Workshop on Engineering of software services for pervasive environments (ESSPE 2007), Seite 21--28. Dubrovnik, Croatia, ACM, (September 2007)Electronic Proceedings.
S. Goschnick, L. Sonenberg, und S. Balbo. Human-Computer Interaction, Volume 332 von IFIP Advances in Information and Communication Technology, Kapitel 4, Springer-Verlag, Berlin/Heidelberg/New York, (2010)
M. Anselmo, D. Giammarresi, und M. Madonia. Theoretical Computer Science, 410 (37):
3520 - 3529(2009)Implementation and Application of Automata (CIAA 2007).
O. Corby, R. Dieng, und C. Hébert. Conceptual Structures: Logical, Linguistic, and Computational
Issues, 8th International Conference on Conceptual Structures,
ICCS 2000, Darmstadt, Germany, August 14-18, 2000, Proceedings, Volume 1867 von LNCS, Seite 468--482. Springer, (2000)