1. Bittman, M. 2008. Rethinking the meat-guzzler. New York Times. January 27, 2008.
2. Callicott, J. Baird. 1980. Animal liberation: A triangular affair. Environmental Ethics 2: 311–338.
3. Callicott, J. Baird. 1994. Preface to animal liberation: A triangular affair. In Environmental ethics, ed. R. Elliot. Oxford: Oxford University Press.
4. Carson, R. 1962. Silent spring. Boston: Mifflin.
5. Carvajal, D., and S. Castle. 2009. A U.S. hog giant transforms Eastern Europe. New York Times. May 5, 2009.