O. Saukh, D. Hasenfratz, und L. Thiele. Proceedings of the 14th International Conference on Information Processing in Sensor Networks, Seite 274--285. ACM, (2015)
J. Mueller, S. Doerfel, M. Becker, A. Hotho, und G. Stumme. Proceedings of the Fifth ACM RecSys Workshop on Recommender Systems and the Social Web co-located with the 7th ACM Conference on Recommender Systems (RecSys 2013), CEUR-WS, (2013)