Akter, S., M. M. Hossain, M. Shirin, I. Khalil, and K. S. Anwar. “Blood Transfusion: A Risk Factor in Retinopathy of Prematurity”. Bangladesh Journal of Child Health, vol. 34, no. 2, Mar. 2012, pp. 38-43, doi:10.3329/bjch.v34i2.10215.