Aarseth, Sverre J. Gravitational N-Body Simulations. New York: Cambridge University Press, 2003.
An, Feng, and Amanda Sauer. “Comparison of Passenger Vehicle Fuel Economy and Greenhouse Gas Emission Standards Around the World.” Pew Center on Global Climate Change, December 2004.
Aristotle. Politics. Translated by Ernest Barker. New York: Oxford University Press, 2009.
Arrow, Kenneth. Social ...