Poomsalood, S., and K. Hambly. “Prevalence of Patellofemoral Pain Syndrome in Young Thai Athletes Registered in Phitsanulok Provincial Administrative Organization Sports School, Thailand”. Journal of Associated Medical Sciences, vol. 52, no. 3, June 2019, pp. 150-7, https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/155215.