M. Schmitz, J. Baus, and R. Dörr. The Internet of Things: First International Conference, IOT 2008, Zurich, Switzerland, volume 4952 of Lecture Notes in Computer Science, Springer, Berlin, (2008)
V. Pavlov, S. Knoch, and M. Deru. Proceedings of the 4th International Symposium on Pervasive Displays (PerDis-15), Saarbrücken, Germany, page 239--240. New York, ACM, (2015)