1. Allison, Henry. 2011. Kant’s Groundwork of the Metaphysics of Morals: A Commentary. Oxford: Oxford University Press.
2. Anapol, Avery. 2017. CDC Banned from Using ‘Evidence-Based’ and ‘Science-Based’ in Official Documents: Report. The Hill, December 15. https://www.thehill.com/news-by-subject/healthcare/365204-trumpt-admin-bans-cdc-from-suing-eveidence-based-and-science-based
3. Bostrum, Nick. 2008. Where Are They? Why I Hope the Search for Extraterrestrial Life Finds Nothing. Technology Review, May/June, 72–77.
4. Brennan, Geoffrey, Lina Eriksson, Robert E. Goodin, and Southwood Nicholas. 2013. Explaining Norms. Oxford: Oxford University Press.
5. Cobb, Matthew. 2016. Alone in the Universe: The Improbability of Alien Civilizations. In Aliens: The World’s Leading Scientists on the Search for Extraterrestrial Life, ed. Jim Al-Khalili, 156–166. New York: Picador.