Yosy, D., R. Nova, J. Tasli, and T. Theodorus. “Ibuprofen Vs. Indomethacin for Persistent Ductus Arteriosus Closure in Preterm Infants”. Paediatrica Indonesiana, Vol. 53, no. 3, June 2013, pp. 138-43, doi:10.14238/pi53.3.2013.138-43.