Ryden, Patcharin. “The Structural Changes and Recovery Times of the Knee Joint After Long Distance Running of the Marathon Runners”. Chiang Mai Medical Journal 58, no. 4 (December 3, 2019): 245-57. Accessed July 13, 2020. https://he01.tci-thaijo.org/index.php/CMMJ-MedCMJ/article/view/227793.