“A Single-Blind Randomized Controlled Trial Comparing the Efficacy of Two Doses of Oral Ibuprofen With Intravenous Indomethacin in Terms of Ductus Arteriosus Closure Among Premature Infants With Patent Ductus Arteriosus: A Phase 2A Clinical Trial”. Acta Medica Philippina, vol. 46, no. 4, Sept. 2013, https://doi.org/10.47895/amp.v47i1.2023.