Matlovič, R., Klamár, R., Kozoň, J., Ivanová, M., & Michalko, M. (2018). Spatial polarity and spatial polarization in the context of supranational and national scales: regions of Visegrad countries after their accession to the EU. Bulletin of Geography. Socio-Economic Series, 41(41), 59–78. https://doi.org/10.2478/bog-2018-0026