1. Aly, A.A.: Using a query expansion technique to improve document retrieval. International Journal Information Technologies and Knowledge (2008)
2. Bonino, D., Corno, F., Farinetti, L., Bosca, A.: Ontology Driven Semantic Search. WSEAS Transaction on Information Science and Application 1(6), 1597–1605 (2004)
3. Lecture Notes in Computer Science;D. Genest,1997
4. Styltsvig, H.B.: Ontology-based Information Retrieval. A dissertation Presented to the Faculties of Roskilde University in Partial Fulfillment of the Requirement for the Degree of Doctor of Philosophy (2006)
5. Eriksso, H.: The semantic-document approach to combining documents and ontologies. International Journal of Human-Computer Studies 65(7), 624–639 (2007)