S. H. Teh and  S. Malawaraarachci and  W. P. Chan and  A. Nassirharand,  Design and Instrumentation of a Benchmark Multivariable Nonlinear Control Laboratory.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 260 - 266
    [viewed 28 January 2020]. Available from: https://publications.waset.org/pdf/15520.