Sujudi, M. A. A., F. Fauziah, and D. Hidayatullah. “Expert System Certainty Factor Method in Website-Based Pest Diagnosis of Eggplant Plants: Expert System Certainty Factor Method in Website-Based Pest Diagnosis of Eggplant Plants”. Jurnal Mantik, vol. 3, no. 4, Feb. 2020, pp. 428-3, https://iocscience.org/ejournal/index.php/mantik/article/view/586.