Roengrit, T., P. Wannanon, P. Prasertsri, Y. Kanpetta, B.- orn Sripanidkulchai, and N. Leelayuwat. “The Acute Treatment Effect Of Phyllanthus Amarus on Heart Rate Variability Responses to Moderate- and High-Intensity Exercise in Sedentary Healthy Men”. Srinagarind Medical Journal, vol. 28, no. 4, Nov. 2013, pp. 258-65, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14887.