Gaotao Shi Minghong Liao Maode Ma Yantai Shu Exploiting sink movement for energy-efficient load-balancing in wireless sensor networks. 39-44 2008 FOWANC http://doi.acm.org/10.1145/1374718.1374726 conf/mobihoc/2008fowanc db/conf/mobihoc/fowanc2008.html#ShiLMS08