Ismail, Laith S., and Ciprian Lupu. “Estimation and Control of an UAV Using Kalman Filter and Relay Feedback Autotuning Method”. Opción 350 (June 9, 2019): 2899-2921. Accessed December 5, 2025. https://produccioncientificaluz.org/index.php/opcion/article/view/31165.