3Lawrence S,Giles CL (1998).Searching the World Wide Web[J].Science 280 (5360):98-100
4Lawrence S,Giles CL (1999).Accessibility of information on the web[J].Nature 400 (6740):107-109
5http://web.simmons.edu/～schwartz/462-defs.html
6Very recently Stephen Arnold has addressed the threat that libraries could become marginalized in his paper" Information boundaries and libraries ",February 2004 (http://www.arnoidit.com/articles/elib Feb2004-fmal.doc)
