Nor Maniha Abdul Ghani and  Faradila Naim and  Tan Piow Yon,  Two Wheels Balancing Robot with Line Following Capability.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 1401 - 1405
    [viewed 28 January 2020]. Available from: https://publications.waset.org/pdf/6566.