WarIsBoring.com. 25 November 2015 [29 April 2016]. (原始内容存档于2015-12-08). Cooper, Hayden. Australians back air strikes against Isis in Iraq by three to one
Lucretius, De rerum natura II, 225–229; Relevant passage appears in: Lane Cooper, Aristotle, Galileo, and the Tower of Pisa(Ithaca, N.Y.: Cornell University