A. Bulling, J. Ward, H. Gellersen, und G. Tröster. Proc. ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp), Seite 41-50. (2009)
T. Bobic, und R. Klinger. Research in Computing Science, (2013)Proceedings of the Conference on Intelligent Text Processing and Computational Linguistics.