* {{Citecite book |url=https://books.google.com/books?id=L6e2AAAAIAAJ |title=Weapons systems and political stability: a history |last=Quigley |first=Carroll |publisher=University Press of America |isbn=978-0-8191-2947-5 |year=1983 |accessdate=20. 5. 2013|pages=307}}