WASET
    G. Cannistraro and  L. Ponterio,  Analysis of Air Quality in the Outdoor Environment of the City of Messina by an Application of the Pollution Index Method.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 262 - 268
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/11654.