Xiaohong Sheng Yu Hen Hu Parmesh Ramanathan Distributed particle filter with GMM approximation for multiple targets localization and tracking in wireless sensor network. 181-188 2005 conf/ipsn/2005 IPSN http://dx.doi.org/10.1109/IPSN.2005.1440923 db/conf/ipsn/ipsn2005.html#ShengHR05