R. Schaefer, S. Bleul, and W. Mueller. Task Models and Diagrams for Users Interface Design, volume 4385 of Lecture Notes in Computer Science, chapter 4, Springer-Verlag, Berlin/Heidelberg, (2007)
A. Neto, R. Fortes, and A. da Silva Filho. Proceedings of the 26th annual ACM international conference on Design of communication, page 277--278. New York, NY, USA, ACM, (2008)
F. Paternò, C. Mancini, and S. Meniconi. Proceedings of the IFIP TC13 Interantional Conference on Human-Computer Interaction, page 362--369. London, UK, UK, Chapman & Hall, Ltd., (1997)
Y. Cui, and C. Penstein Rosé. Intelligent Tutoring Systems, volume 5091 of Lecture Notes in Computer Science, chapter 107, Springer-Verlag, Berlin/Heidelberg, (2008)
A. Nguyen, and W. Wobcke. Proceedings of the 10th international conference on Intelligent user interfaces, page 137--144. New York, NY, USA, ACM, (2005)
M. Blumendorf, G. Lehmann, and S. Albayrak. Proceedings of the 2nd ACM SIGCHI symposium on Engineering interactive computing systems, page 9--18. New York, NY, USA, ACM, (2010)
A. Dittmar, and P. Forbrig. Proceedings of the 6th international conference on Task models and diagrams for user interface design, page 198--212. Berlin/Heidelberg, Springer-Verlag, (2007)
T. Heinroth, D. Denich, and W. Minker. Universal Access in Human-Computer Interaction. Applications and Services, volume 6768 of Lecture Notes in Computer Science, chapter 5, Springer-Verlag, Berlin/Heidelberg, (2011)