Sitnikova Elena F. RussiaBryansk RegionState Nature Biosphere Reserve “Bryansky Les”, St. Nerussa, Suzemsky District, Bryansk Region 242180, Russiasitnikovae@yandex.ru Author's articles About the Border between Two Phylogroups of the Common Hamster (Cricetus cricetus) (Cricetinae, Rodentia)