Karachurina, L. and Mkrtchyan, N. 2015. Population change in the regional centres and internal periphery of the regions in Russia, Ukraine and Belarus over the period of 1990-2000s. Bulletin of Geography. Socio-economic Series. 28 (May 2015), 91–111. DOI:https://doi.org/10.1515/bog-2015-0018.