F. Radeke, и P. Forbrig. Proceedings of the 6th international conference on Task models and diagrams for user interface design, стр. 184--197. Berlin/Heidelberg, Springer-Verlag, (2007)
A. Neto, и R. de Mattos Fortes. Proceedings of the 28th ACM International Conference on Design of Communication, стр. 151--158. New York, NY, USA, ACM, (2010)