HEIYANTHUDUWAGE, S. R.; KARUNARATNA, D. D. An Iterative and Incremental Approach for E-Learning Ontology Engineering. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 4, n. 1, p. pp. 40–46, 2008. DOI: 10.3991/ijet.v4i1.696. Disponível em: https://online-journals.org/index.php/i-jet/article/view/696. Acesso em: 19 jan. 2022.