Kusuma, Umar Wirahadi, Nurul Azizah, and Rahayu Widodo. “Sistem Pakar Diagnosa Penyakit Tanaman Tomat Menggunakan Metode Forward Chaining”. Nusantara of Engineering 3, no. 2 (August 6, 2018): 71-75. Accessed June 7, 2020. https://ojs.unpkediri.ac.id/index.php/noe/article/view/12343.