Border states (Eastern Europe)

Harcourt: 316. 2002. ISBN 0-618-22647-8. Eastern Bloc. The name applied to the former communist states of eastern Europe, including Yugoslavia and Albania,

and the New States of Eurasia. M.E. Sharpe. 2001-01-01: 100. ISBN 978-0-7656-1398-1 （英语）.  Burant, Stephen R.; Zubek, Voytek. Eastern Europe's Old Memories

俄罗斯迁移至此。该地区在16世纪和17世纪遭受了克里米亚-诺盖奴隶袭击（英语：Crimean–Nogai slave raids in Eastern Europe）。 1779年5月23日，库尔斯克省成立。该省一直存在到1928年，其领土并入中央黑土州（英语：Central Black Earth

Kornbluh, eds., The Cuban Missile Crisis, 1962 (1992) Crampton, R. J. Eastern Europe in the twentieth century and after. Routledge. 1997. ISBN 0-415-16422-2

Georg von Rauch, The Baltic States: The Years of Independence 1917-1940, Hurst & Co, 1974, p73 Frucht, Richard. Eastern Europe. ABC-CLIO. 2005: 76. ISBN 1576078000