Demetrios Zeinalipour-Yazti Zografoula Vagena Vana Kalogeraki Dimitrios Gunopulos Vassilis J. Tsotras Michail Vlachos Nick Koudas Divesh Srivastava 1431-1449 2009 53 Computer Networks 9 http://dx.doi.org/10.1016/j.comnet.2009.01.008 db/journals/cn/cn53.html#Zeinalipour-YaztiVKGTVKS09