Saurabh Ganeriwal Deepak Ganesan Mark H. Hansen Mani B. Srivastava Deborah Estrin Rate-adaptive time synchronization for long-lived sensor networks. 374-375 2005 conf/sigmetrics/2005 SIGMETRICS http://doi.acm.org/10.1145/1064212.1064261 db/conf/sigmetrics/sigmetrics2005.html#GaneriwalGHSE05