C. Berger, M. Wagner, and G. Reinhart. Intelligente Vernetzung in der Fabrik: Industrie 4.0 Umsetzungsbeispiele für die Praxis, Fraunhofer Verlag, Stuttgart, (2015)
J. Mori, Y. Matsuo, H. Koshiba, K. Aihara, and H. Takeda. User Modeling, Adaptation, and Personalization: 17th International Conference, UMAP 2009, formerly UM and AH, Trento, Italy, volume 5535 of Lecture Notes in Computer Science, Springer, Berlin, (2009)