1. Aquinas T. 1920. Summa Theologiæ of St. Thomas Aquinas 2nd ed. (Part II II Question 40 Article 1). Translated by Fathers of the English Dominican Province online edition 2017. https://www.newadvent.org/summa/3040.htm#article1.
2. In Defence of War
3. Charles, J. Daryl, and Timothy J. Demy. 2010. War, Peace, and Christianity: Questions and Answers from a Just-War Perspective. Wheaton, IL: Crossway.
4. Herodotus. 1922. The Histories Book VII. Translated by G. C. Macaulay with adaptations in Loeb Classical Library Vol. III. (7.138-239). https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Herodotus/7C*.html#138.
5. Hom, Andrew R. 2018. “Cian O’Driscoll.” In Moral Victories: The Ethics of Winning Wars, edited by Kurt Mills, 303–330. Oxford: University of Oxford Press.