D. Salber, A. Dey, and G. Abowd. CHI '99: Proceedings of the SIGCHI conference on Human factors in computing systems, page 434--441. New York, NY, USA, ACM, (1999)
A. Cádiz, S. González, and K. Mens. Proceedings of the first international workshop on Context-aware software technology and applications, page 5 -- 8. New York, NY, USA, ACM, (2009)
K. Geihs, R. Reichle, M. 0001, and M. Khan. Software Engineering for Self-Adaptive Systems, volume 5525 of Lecture Notes in Computer Science, page 146-163. Springer, (2009)