* {{citeCite book |ref= harv|last=Jackson|first=Gabriel|title=The Spanish Republic and the Civil War: 1931 - 1939|url=http://books.google.com/books?id=6bvIoAEACAAJ|year=1967|publisher=Princeton University Press}}
* {{citeCite book |ref= harv|last=Beevor|first=Antony|title=The Battle for Spain: The Spanish Civil War, 1936-1939|url=http://books.google.com/books?id=VsGtxYCcE2MC|year=2006|publisher=Penguin Books|isbn=978-0-14-303765-1}}