References
- Lawrence S, Giles CL. Searching the world wide web. Science 1998; 280: 98–100.
- Pitkow J, Hjelm J, Frystyk Nielsen H. Web characterization: from working group to activity. W3C Note, 19 March 1999. www.w3.org/TR/Note-WCA/
- Eysenbach G, Sa ER, Diepgen TL. Shopping around the internet today and tomorrow: towards the millennium of cybermedicine. BMJ 1999; 3: 1294–1304.