Tungtang, W., T. Daramas, and J. Wittayasooporn. “Effect of Oropharyngeal Colostrum Administration in Premature Infants on Nosocomial Infections”. Nursing Research and Innovation Journal, vol. 24, no. 2, Oct. 2018, pp. 109-21, https://he02.tci-thaijo.org/index.php/RNJ/article/view/112942.