Signorini, Alessio, Segre, Alberto Maria and Polgreen, Philip M.. "The Use of Twitter to Track Levels of Disease Activity and Public Concern in the U.S. during the Influenza A H1N1 Pandemic." PLoS ONE 6 , no. 5 (2011): e19467.

Keally, Matthew, Zhou, Gang, Xing, Guoliang, Wu, Jianxin and Pyles, Andrew. "PBN: towards practical activity recognition using smartphone-based body sensor networks." Paper presented at the meeting of the Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems, New York, NY, USA, 2011.