WASET
    J. Kellner and  A. Bumbová and  D. Pluskal and  A. Langerová and  Z. Večeřa and  P. Mikuška,  Portable Continuous Aerosol Concentrator for the Determination of NO2 in the Air.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 324 - 327
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/15894.