SIANIPAR, baringin; MARPAUNG, P. Expert System Diagnosing Diseases in Coffee Plants Using Certainty Factor Method. Jurnal ICT : Information and Communication Technologies, [S. l.], v. 12, n. 2, p. 13–17, 2021. Disponível em: https://www.ejournal.marqchainstitute.or.id/index.php/JICT/article/view/7. Acesso em: 31 jul. 2026.