Qingzhao Tan Ziming Zhuang Prasenjit Mitra C. Lee Giles Efficiently Detecting Webpage Updates Using Samples. 285-300 2007 conf/icwe/2007 ICWE http://dx.doi.org/10.1007/978-3-540-73597-7_23 db/conf/icwe/icwe2007.html#TanZMG07