KRZYŻANIAK, Michał, ŚWIERK, Dariusz, SZCZEPAŃSKA, Magdalena and URBAŃSKI, Piotr. Changes in the area of urban green space in cities of western Poland. Bulletin of Geography. Socio-economic Series. Online. 1 March 2018. Vol. 39, no. 39, pp. 65-77. [Accessed 7 July 2024]. DOI 10.2478/bog-2018-0005.