Pharchua, Pitchayaphar, Tipawan Daramas, and Renu Pookboonmee. “Effects of Leg and Foot Massage on Pain, Heart Rate, and Oxygen Saturation in Preterm Infants Undergoing Heel Stick”. Ramathibodi Nursing Journal 24, no. 3 (January 7, 2019): 279–294. Accessed December 9, 2022. https://he02.tci-thaijo.org/index.php/RNJ/article/view/119314.