Mohamad Azmi Haniffa and  Fakhruldin Mohd Hashim,  Recent Developments in Speed Control System of Pipeline PIGs for Deepwater Pipeline Applications.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2012, vol. 62(2). 437 - 440
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/11567.