5MURRAY B,MOORE A.Sizing the Internet[M].[S.l.]:Cyveillance Inc,2000.
6LAWRENCE S,GILES L.Accessibility and distribution of information on the Web[J].Nature,1999,400(8):107-109.
7CHO J,CARCIA M H.The evolution of the Web and implication for an incremental crawler[C]//Proc of the 26th International Conference on Very Large Databases (NVLDB-00).2000.
8BREWINGTON B E,CYBENKO C.How dynamic is the Web[C]//Proc of the 9th International World Wide Web Conference.2000.
9MENCZER F,PANT C,RUIZ M E.Evaluating topic-driven Web crawlers[C]//Proc of SIGIR'01.New Orleans,Louisiana:[s.n.],2001:241-249.