Zainol, Zakariya, et al. “Locomotion Performance of Amphibious Robot Vehicle Using Transformable Rocker-Bogie Mechanism”. ELEKTRIKA- Journal of Electrical Engineering, vol. 20, no. 2-3, Oct. 2021, pp. 111-6, https://elektrika.utm.my/index.php/ELEKTRIKA_Journal/article/view/328.