Natália B. Pompermayer and  Mariana B. Porto and  Elizabeth F. Souza,  Environmental Analysis of the Zinc Oxide Nanophotocatalyst Synthesis.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 380 - 385
    [viewed 22 November 2019]. Available from: https://publications.waset.org/pdf/7015.