SINAGA, E. P. Expert System for Diagnosing Pests and Diseases in Arabica Coffee Plants using the Certainty Factor Method. International Journal of Basic and Applied Science, [S. l.], v. 9, n. 2, p. 34–37, 2020. DOI: 10.35335/ijobas.v9i2.13. Disponível em: https://www.ijobas.pelnus.ac.id/index.php/ijobas/article/view/13. Acesso em: 16 apr. 2026.