1. Pinto, H., Martins, J.: Ontologies: How can They be Built? Knowledge and Information Systems 6(4), 441–464 (2004)
2. Suchanek, F.M., Sozio, M., Weikum, G.: SOFIE: A Self-Organizing Framework for Information Extraction. In: Proc. of the 18 th Intern. World Wide Web Conf. (WWW 2009), Madrid, Spain, pp. 631–640. ACM Press, New York (2009)
3. Pantel, P., Pennacchiotti, M.: Automatically Harvesting and Ontologizing Semantic Relations. In: Proc. of the 2008 Conf. on Ontology Learning and Population: Bridging the Gap between Text and Knowledge, pp. 171–195. IOS Press, Amsterdam (2008)
4. Velardi, P., Navigli, R., Cucchiarelli, A., Neri, F.: Evaluation of OntoLearn, a Methodology for Automatic Learning of Ontologies. In: Buitelaar, P., Cimmiano, P., Magnini, B. (eds.) Ontology Learning from Text: Methods, Evaluation and Applications, pp. 569–572. IOS Press, Amsterdam (2005)
5. Buitelaar, P., Cimiano, P., Frank, A., Racioppa, S.: SOBA: SmartWeb Ontology-based Annotation. In: Proc. of the Demo Session at the Intern. Semantic Web Conference (ISWC), Athens GA, USA (November 2006)