Pinto, Nicanor R. S., et al. “ (Im)possibilities of Implementing an Unified Health Services Management in the Brazilian National Health System (SUS) in a Large Municipality: The Case of São Paulo City, Brazil ”. Saúde E Sociedade, vol. 19, no. 3, Sept. 2010, pp. 518-32, https://doi.org/10.1590/S0104-12902010000300005.