Jae Hyok Kong, and Xuchu Mao. “BDS/GPS/Multi-System/Positioning/Based/on/Nonlinear/Filter/Algorithm”. Global Journal of Computer Science and Technology 16, no. G1 (January 15, 2016): 9–15. Accessed May 18, 2024. https://computerresearch.org/index.php/computer/article/view/1418.