Hanklar, S., S. Sripak, and N. Niyomthai. “Optimization and construction of solid spring type of main tricycle landing gear for light aircraft”. Journal of Research and Applications in Mechanical Engineering, vol. 3, no. 2, Aug. 2018, p. 43, https://ph01.tci-thaijo.org/index.php/jrame/article/view/139398.