WASET
    Mauricio Pe˜na and  Adriana Luna and  Carol Rodr´ıguez,  Identification of an Unstable Nonlinear System: Quadrotor.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 86(2). 309 - 317
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/9997442.