Kusuma, A. G., F. Fauziah, and E. T. H. Esti. “Web-Based Expert System to Identify Pests and Diseases in Tomato Plants Using the Certainty Factor Method: Web-Based Expert System to Identify Pests and Diseases in Tomato Plants Using the Certainty Factor Method”. Jurnal Mantik, vol. 3, no. 4, Feb. 2020, pp. 531-9, https://iocscience.org/ejournal/index.php/mantik/article/view/607.