George Lagogiannis Nikos A. Lorentzos Alexander B. Sideridis Indexing Moving Objects: A Real Time Approach. 421-426 2010 WSKS (1) http://dx.doi.org/10.1007/978-3-642-16318-0_51 conf/wsks/2010-1 db/conf/wsks/wsks2010-1.html#LagogiannisLS10