Hoang Do Thanh Tung Keun Ho Ryu One Update for all Moving Objects at a Timestamp. 6 2006 conf/IEEEcit/2006 CIT http://doi.ieeecomputersociety.org/10.1109/CIT.2006.129 db/conf/IEEEcit/IEEEcit2006.html#TungR06