Limpens, F., Gandon, F. & Buffa, M. (2008). Bridging ontologies and folksonomies to leverage knowledge sharing on the social Web: A brief survey. Automated Software Engineering - Workshops, 2008. ASE Workshops 2008. 23rd IEEE/ACM International Conference on, , 13-18.  doi: 10.1109/ASEW.2008.4686305

Tresp, V., Bundschus, M., Rettinger, A. & Huang, Y. (2008). Towards machine learning on the semantic web . Uncertainty Reasoning for the Semantic Web I Lecture Notes in AI  Springer. 

Zhou, L. (2007). Ontology learning: state of the art and open issues. Information Technology and Management, 8, 241--252. 

Cimiano, P., V"olker, J. & Studer, R. (2006). Ontologies on Demand? -A Description of the State-of-the-Art, Applications, Challenges and Trends for Ontology Learning from Text Information. Information, Wissenschaft und Praxis, 57, 315-320. 

Brank, J., Grobelnik, M. & Mladenić, D. (2005). A Survey of Ontology Evaluation Techniques. Proc. of 8th Int. multi-conf. Information Society (p./pp. 166--169),.
ómez-Pérez, A. & Manzano-Macho, D. (2003). A survey of ontology learning methods and techniques (Deliverable1.5). OntoWeb Consortium.