Wamontree, P., N. Kanchanakhan, and W. Eungpinichpong. “Effects of Traditional Thai Self-Massage Using a Massage Stick versus Ibuprofen on Upper Back Pain Associated with Myofascial Trigger Points: a Pilot Study”. Journal of Health Research, vol. 29, no. 6, Aug. 2017, pp. 403-8, https://he01.tci-thaijo.org/index.php/jhealthres/article/view/97208.