Giovani Librelotto and Pedro Henriques. 2009.
 Specification and Processing of Ontologies for Semantic Web. In <em>Proceedings of the 5th Brazilian Symposium on Information Systems</em>, May 20, 2009, Brasília, Brasil. SBC, Porto Alegre, Brasil, 320-324. DOI: <a href="https://doi.org/10.5753/sbsi.2009.6190">https://doi.org/10.5753/sbsi.2009.6190</a>.