Janmanee, T., C. Yusamran, A. Ratinthorn, and W. Phahuwatanakorn. “Effects of Cooling and Heat Application on Perineal Inflammation and Pain in Postpartum Mothers”. Nursing Science Journal of Thailand, vol. 32, no. 4, Jan. 2015, pp. 25-34, https://he02.tci-thaijo.org/index.php/ns/article/view/28513.