López-Cepero, Ronald, et al. “Rapid Resolution of Polyhydramnios Foretells Circulatory Collapse for the Donor Twin in Feto-Fetal Transfusion Syndrome”. Puerto Rico Health Sciences Journal, vol. 35, no. 1, Feb. 2016, https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/1182.