Oliveira, A., P. Soares, F. Flor-de-Lima, A. L. Neves, and Guimarães H. “PDA Management in VLBW Infants: Experience of a Level III NICU”. Journal of Pediatric and Neonatal Individualized Medicine (JPNIM), vol. 5, no. 2, Aug. 2016, p. e050227, doi:10.7363/050227.