Varela, K. N., Fleck, A. S., Rhoden, C. R., Crippa, L. B. e Damiani, R. M. E. (2019) “Evaluation of air quality in Caxias do Sul/Brazil through bioassay and passive sampling of NO2 and O3 between September and November of 2014”, Scientific Electronic Archives, 12(1), p. 71–80. doi: 10.36560/1212019608.