ŚRODA-MURAWSKA, Stefania and SZYMAŃSKA, Daniela. The concentration of the creative sector firms as a potential basis for the formation of creative clusters in Poland. Bulletin of Geography. Socio-economic Series. Online. 19 June 2013. No. 20, p. 85–93. [Accessed 7 July 2024]. DOI 10.1515/bog-2013-0013.