Syamsuddin, Touha, Malik Hj. Abu Hassan, Fudziah Ismai, and Leong, W.J. 2007. “Stability Analysis and Maximum Profit of One Prey-Two Predators Model under Constant Effort of Harvesting”. Malaysian Journal of Science 26 (December):43-51. http://mjs.um.edu.my/index.php/MJS/article/view/8725.