Freitas, I.G.F., Alves, J.C. da S., Mariano, E.V.C. and Mariano, G.L. 2018. Behavior of nitrogen dioxide on the northeast region of Brazil and its relationship with meteorological variables. Ciência e Natura. 40, (Mar. 2018), 32–38. DOI:https://doi.org/10.5902/2179460X30531.