CHUKHRAY, A. G.; KULIK, A. S.; CHUKHRAY, M. Diagnostic models of intelligent tutor system for teaching skills to solve algebraic equations. International Journal of Emerging Technologies in Learning (iJET), [S. l.], v. 2, n. 1, 2006. DOI: 10.3991/ijet.v2i1.68. Disponível em: https://online-journals.org/index.php/i-jet/article/view/68. Acesso em: 21 jan. 2022.