Guangyu Liu,  Remarks on Energy Based Control of a Nonlinear, Underactuated, MIMO and Unstable Benchmark.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2008, vol. 24(12). 2867 - 2874
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/12678.