Asrofi, Fauzi, and Sri Lestanti. “Application of Expert Systems to Determine I’rob Signs in a Kalimah Using the Forward Chaining Method”. JOSAR (Journal of Students Academic Research) 6, no. 1 (March 1, 2021): 111-119. Accessed April 20, 2024. https://ejournal.unisbablitar.ac.id/index.php/josar/article/view/1460.