Boonla, O., S. Pueng-am, A. Lohawach, J. Sudapun, and K. Khamsuk. “Effect of Diaphragmatic Breathing Control on Heart Rate Variability in Overweight and Obese Female Adolescents”. Srinagarind Medical Journal, vol. 33, no. 5, July 2018, pp. 95-101, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/137102.