Bhuvan Bamba Ling Liu Arun Iyengar Philip S. Yu Distributed Processing of Spatial Alarms: A Safe Region-Based Approach. 207-214 2009 ICDCS http://dx.doi.org/10.1109/ICDCS.2009.25 conf/icdcs/2009 db/conf/icdcs/icdcs2009.html#BambaLIY09