Clode, N., Marques, J. P., Casal, E., & Graça, L. (1992). Relationship between the Steuart resistance index of the umbilical artery in non-pathologic pregnancy and the weight and ponderal index of the newborn. Acta Médica Portuguesa, 5(1), 1–3. https://doi.org/10.20344/amp.3192