R. Baeza-Yates, P. Boldi, and C. Castillo. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, page 308--315. New York, NY, USA, ACM, (2006)
R. Baeza-Yates, P. Boldi, and C. Castillo. Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval, page 308--315. New York, NY, USA, ACM, (2006)