^Eldridge M. Moores; Rhodes Whitmore Fairbridge. Encyclopedia of European and Asian Regional Geology. Springer. 1997. ISBN 978-0-412-74040-4(英语).
^Adami Jordan; Peter Jordan; Milan Orožen Adamič. Exonyms and the International Standardisation of Geographical Names: Approaches Towards the Resolution of an Apparent Contradiction. LIT Verlag Berlin-Hamburg-Münster. 2007: 240. ISBN 978-3-8258-0035-2(英语).
^George Walter Hoffman; Christopher Shane Davies. A Geography of Europe: Problems and Prospects. Wiley. 1983: 647. ISBN 978-0-471-89708-8(英语).
^
George Walter Hoffman; Nels August Bengtson. A Geography of Europe. Ronald Press Co. 1953: 757 (英语).