1. A. Faatz and R. Steinmetz, “Ontology enrichment with texts from the www,” Semantic Web Mining 2nd Workshop at ECML/PKDD, Helsinki, Finland, 2002.
2. S. Aussenac-Gilles, S. Despres, and S. Szulman, “The terminae method and platform for ontology engineering from texts,” Proc. of the Conf. on Ontology Learning and Population: Bridging the Gap between Text and Knowledge, 2008.
3. A. Auger and C. Barrière, Pattern based approaches to semantic relation extraction: a state-of-the-art Terminology, Vol.14, No.1, pp. 1-19, 2008.
4. D. Palmer, Text Pre-processing, Handbook of Natural Language Processing, Second Edition, CRC Press, Taylor and Francis, 2010.
5. T. S. Tollari, A. Rosni, and T. Enyakong, “Extending Ontology Tree Using NLP Technique,” Proc. of National Conf. on Research & Development in Computer Science REDECS, 2001.