A. Karthy, L. Aravindh, V. Arun, A. Boopathi, & K. Divakar. (2019). Design and fabrication of semi-automatic gear shifting mechanism for physically challenged persons vehicle with reverse motion . International Journal of Intellectual Advancements and Research in Engineering Computations, 7(2), 2437–2742. https://doi.org/10.61096/ijiarec.v7.iss2.2019.2437-2742