«Determination of Fetal Gestational Age in Singleton Pregnancies: Accuracy of Ultrasonographic Placenta Thickness and Volume at a Nigerian Tertiary Hospital». African Journal of Biomedical Research, libk. 25, zenb. 2, 2022(e)ko maiatzaren, or. 113-9, https://doi.org/10.4314/ajbr.v25i2.1.