Fang Liu Xiuzhen Cheng Dong Hua Dechang Chen TPSS: A Time-Based Positioning Scheme for Sensor Networks with Short Range Beacons. 33-42 2005 conf/iccnmc/2005 ICCNMC http://dx.doi.org/10.1007/11534310_6 db/conf/iccnmc/iccnmc2005.html#LiuCHC05