R. Rana, C. Chou, S. Kanhere, N. Bulusu, and W. Hu. Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks, page 105--116. ACM, (2010)
J. Mueller, S. Doerfel, M. Becker, A. Hotho, and 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)