B. Jansen, D. Booth, und A. Spink. WWW '07: Proceedings of the 16th international conference on World Wide Web, Seite 1149--1150. New York, NY, USA, ACM, (2007)
B. Jansen, D. Booth, und A. Spink. WWW '07: Proceedings of the 16th international conference on World Wide Web, Seite 1149--1150. New York, NY, USA, ACM, (2007)