Baeza-Yates, R., Ribeiro-Neto, B. (2008). Modern information retrieval. Harlow: Pearson Addison-Wesley [u.a.]. ISBN: 0201398298

Fonseca, B. M., Golgher, P., Pôssas, B., Ribeiro-Neto, B. & Ziviani, N. (2005). Concept-based interactive query expansion. CIKM '05: Proceedings of the 14th ACM international conference on Information and knowledge management (p./pp. 696--703), New York, NY, USA: ACM Press. ISBN: 1-59593-140-6

Baeza-Yates, R. A., Ribeiro-Neto, B. (1999). Modern Information Retrieval. Boston, MA, USA: Addison-Wesley Longman Publishing Co., Inc.. ISBN: 020139829X

Baeza-Yates, R. A., Ribeiro-Neto, B. A. (1999). Modern Information Retrieval. ACM Press / Addison-Wesley. ISBN: 0-201-39829-X

Baeza-Yates, R. A., Ribeiro-Neto, B. A. (1999). Modern Information Retrieval. ACM Press / Addison-Wesley. ISBN: 0-201-39829-X