Elżbieta Antczak,  Urban Greenery in the Greatest Polish Cities: Analysis of Spatial Concentration.   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2017, vol. 125(5). 578 - 585
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10006922.