Sihombing, Denny Jean Cross, Rusmin Saragih, and Elvika Rahmi. 2018. “Sistem Pakar Diagnosa Penyakit Kelapa Sawit Menggunakan Metode Dempster Shafer Berbasis Web”. JITA (Journal of Information Technology and Accounting) 1 (1), 26-40. https://jurnal.uimedan.ac.id/index.php/JITA/article/view/544.