S. A. Vidal, I. C. Samico, P. G. de Frias, and Z. M. de A. Hartz, “ An exploratory study of the costs and consequences of prenatal care in the Family Health Program ”, Rev. saúde pública, vol. 45, no. 3, pp. 467–474, Jun. 2011, doi: 10.1590/S0034-89102011005000014.