Tao, Zhang, PEI Jin-xin, SONG Yu-guang, and LUO Peng. “The Attitude Signal Processing of Four Rotor Aircraft Based on a Kalman Filter”. International Journal of Online and Biomedical Engineering (iJOE) 11, no. 8 (October 26, 2015): pp. 8–12. Accessed April 27, 2024. https://online-journals.org/index.php/i-joe/article/view/4883.