K. Sousa, H. Mendonça, und J. Vanderdonckt. Task Models and Diagrams for User Interface Design, Volume 4849 von Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2007)
M. Blumendorf, G. Lehmann, und S. Albayrak. Proceedings of the 2nd ACM SIGCHI symposium on Engineering interactive computing systems, Seite 9--18. New York, NY, USA, ACM, (2010)