Harahap, S., C. Harahap, S. Sulastri, C. Yoel, and N. Raid. “Association Between Acid-Base Balance and Asphyxia in Newborn Infants”. Paediatrica Indonesiana, Vol. 34, no. 1-2, Nov. 2018, pp. 38-43, doi:10.14238/pi34.1-2.1994.38-43.