H. Mansor and  S. B. Mohd-Noor and  T. S. Gunawan and  S. Khan and  N. I. Othman and  N. Tazali and  R. B. Islam,  Performance Comparisons between PID and Adaptive PID Controllers for Travel Angle Control of a Bench-Top Helicopter.   journal   = {International Journal of Electrical and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 97(1). 35 - 40
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10000274.