S. I. V. Sousa and  F.G. Martins and  M. C. Pereira and  M. C. M. Alvim-Ferraz and  H. Ribeiro and  M. Oliveira and  I. Abreu,  Use of Multiple Linear Regressions to Evaluate the Influence of O3 and PM10 on Biological Pollutants.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 105 - 110
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/15256.