Serrano, O. Y. A., Oliveira, I. de A., Silva, T. G. F., & Barbosa, R. V. R. (2021). Reflections on the concept of healthy cities from three cities in Northeast Brazil. The Journal of Engineering and Exact Sciences, 7(1), 12121–01. https://doi.org/10.18540/jcecvl7iss1pp12121-01-12e