Khunkitti, C., L. Mato, T. Hunsawong, A. Paungmali, and Y. Boonprakob. “Effects of occipito-frontal release with dorsiflexion technique (OFRDF) for improvement of superficial back line flexibility”. Journal of Associated Medical Sciences, vol. 54, no. 1, Oct. 2020, pp. 26-34, https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/242283.