Tzu-Chieh Tsai Jian-Jia Chen Wen-Ching Lo Design and Implementation of Mobile Personal Emotion Monitoring System. 430-435 2009 Mobile Data Management http://doi.ieeecomputersociety.org/10.1109/MDM.2009.78 conf/mdm/2009 db/conf/mdm/mdm2009.html#TsaiCL09