Soonthornkiti, S., and P. Jearanaisilawong. “Design of anti-bedsore hospital bed”. Journal of Research and Applications in Mechanical Engineering 1, no. 4 (October 7, 2018): 15–20. accessed March 2, 2026. https://ph01.tci-thaijo.org/index.php/jrame/article/view/149444.