Biao Zhang,  Peng Xiao,  Hongliang Liu,  Mingyue Ma,  Qian Wang & Zhi Mao. (2020). Quadrotor Convergence Trajectory Optimization Model Based on Minimum Energy Consumption.
            <i>Advances in Applied Mathematics and Mechanics</i>. <i>10</i> (3).
            673-689.
         doi:10.4208/aamm.OA-2017-0059