Robust Discrete-Time Nonlinear Attitude Stabilization of a Quadrotor UAV Subject to Time-Varying Disturbances. ELEKTRON ELEKTROTECH [Internet]. 2021 Aug. 17 [cited 2025 Dec. 5];27(4):4-12. Available from: https://eejournal.ktu.lt/index.php/elt/article/view/28916