Wenyu Zhao Jun Gao Xiaotian Liu Yaping Wu Development of a RFID Multi-point Positioning and Attendance System Based on Data Comparison Algorithm. 677-683 2012 ICICA (LNCS) https://doi.org/10.1007/978-3-642-34062-8_88 conf/icica/2012 db/conf/icica/icica2012.html#ZhaoGLW12