M. Sanderson, und B. Croft. SIGIR '99: Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval, Seite 206--213. New York, NY, USA, ACM Press, (1999)
M. Sanderson, und B. Croft. SIGIR '99: Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval, Seite 206--213. New York, NY, USA, ACM Press, (1999)