M. Keally, G. Zhou, G. Xing, J. Wu, und A. Pyles. Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems, Seite 246--259. New York, NY, USA, ACM, (2011)
E. Bakshy, I. Rosenn, C. Marlow, und L. Adamic. (2012)cite arxiv:1201.4145Comment: 10 pages, 7 figures. In the Proceedings of ACM WWW 2012, April 16-20, 2012, Lyon, France.