Zhi Li Xin Ma 0001 Yibin Li 0001 Robust trajectory tracking control for a quadrotor subject to disturbances and model uncertainties. 839-851 2020 51 Int. J. Syst. Sci. 5 https://doi.org/10.1080/00207721.2020.1746430 db/journals/ijsysc/ijsysc51.html#LiML20