Shi, Guolong, et al. “Application of Multi-Sensor Information Fusion Based on Improved Particle Swarm Optimization in Unmanned System Path Planning”. International Journal of Online and Biomedical Engineering (iJOE), vol. 13, no. 08, Aug. 2017, pp. pp. 88-105, doi:10.3991/ijoe.v13i08.7199.