Souza, Mariângela Alves, et al. “Placental Weight and Birth Weight to Placental Weight Ratio in Monochorionic and Dichorionic Growth-Restricted and Non-Growth-Restricted Twins”.
Clinics, vol. 72, no. 5, May 2017, pp. 265-71,
https://doi.org/10.6061/clinics/2017(05)02.