Goce Trajcevski Roberto Tamassia Hui Ding Peter Scheuermann Isabel F. Cruz Continuous probabilistic nearest-neighbor queries for uncertain trajectories. 874-885 2009 EDBT http://doi.acm.org/10.1145/1516360.1516460 conf/edbt/2009 db/conf/edbt/edbt2009.html#TrajcevskiTDSC09