S. T. Maeda, P. F. Moleiro, E. Y. Egry, and S. I. Ciosak, “Human resources in primary health care: investments and the driving force of production”, Rev. Esc. Enferm. USP, vol. 45, no. spe2, pp. 1651–1655, Dec. 2011, doi: 10.1590/S0080-62342011000800002.