Sadiq, Ahmed, and Firas Raheem. “Robot Arm Path Planning Using Modified Particle Swarm Optimization Based on D* Algorithm”. Al-Khwarizmi Engineering Journal 13, no. 3 (September 30, 2017): 27-37. Accessed November 19, 2019. http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/361.