Szajnowska-Wysocka, A. and Zuzańska-Żyśko, E. 2013. The Upper-Silesian conurbation on the path towards the “Silesia” metropolis. Bulletin of Geography. Socio-economic Series. 21 (Aug. 2013), 111–124. DOI:https://doi.org/10.1515/bog-2013-0025.