KARACHURINA, Liliya and MKRTCHYAN, Nikita. 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. Online. 7 May 2015. No. 28, p. 91–111. [Accessed 22 May 2025]. DOI 10.1515/bog-2015-0018.