Rodrigues, Edilene Matos, et al. “Prenatal Care Protocol: Actions and the Easy and Difficult Aspects Dealt by Family Health Strategy Nurses”. Revista Da Escola De Enfermagem Da USP, vol. 45, no. 5, Oct. 2011, pp. 1041-7, https://doi.org/10.1590/S0080-62342011000500002.