Wisnumurti, D. “Congenital Malformations in the Neonatal Unit of Arifin Achmad Hospital, Pekanbaru: Occurrence and Trends”. Paediatrica Indonesiana, Vol. 52, no. 5, Oct. 2012, pp. 284-8, doi:10.14238/pi52.5.2012.284-8.