Yuan-Ko Huang Zhi-Wei Chen Chiang Lee Continuous K-Nearest Neighbor Query over Moving Objects in Road Networks. 27-38 2009 APWeb/WAIM http://dx.doi.org/10.1007/978-3-642-00672-2_5 conf/waim/2009 db/conf/waim/waim2009.html#HuangCL09