Devdutt and  M. L. Aggarwal,  Active Vibration Control of Passenger Seat with HFPIDCR Controlled Suspension Alternatives.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2016, vol. 113(5). 989 - 996
    [viewed 19 September 2019]. Available from: https://publications.waset.org/pdf/10004893.