Mohammad Jazzar, M., M. Daud, M. Z. Bardaie, A. R. Ramli, and S. Said. “A Knowledge-Based Expert System For EIA Using Blackboard Approach”. Malaysian Journal of Computer Science, vol. 11, no. 2, Dec. 1998, pp. 15-22, http://jice.um.edu.my/index.php/MJCS/article/view/5729.