HARMAINI, H.; SIMANJUNTAK, M.; SYAHPUTRA, S. Implementation of Certainty Factor Method in a Web-Based Expert System for Abacus Student Level Assessment. Journal of Artificial Intelligence and Engineering Applications (JAIEA), [S. l.], v. 6, n. 1, p. 623–629, 2026. DOI: 10.59934/jaiea.v6i1.2810. Disponível em: https://mail.ioinformatic.org/index.php/JAIEA/article/view/2810. Acesso em: 17 oct. 2026.