Byung Hoon Seo and  Hyun Gyu Kim and  Tae Won Seo,  Kinematic Optimal Design on a New Robotic Platform for Stair Climbing.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2013, vol. 74(2). 177 - 182
    [viewed 22 April 2021]. Available from: https://publications.waset.org/pdf/5971.