1. Asher, Zev (2004) ‘Casuistry: the Art of Killing a Cat’ 91 min ( Canada: Rough Age Projectiles).
2. Attfield, Robin (1983) The Ethics of Environmental Concern ( New York: Columbia University Press).
3. Bloom, P. (1996) ‘Intention, History, and Artifact Concepts’, Cognition, 60: 1–29.
4. Bookchin, Murray (1980) Toward an Ecological Society ( Montreal: Black Rose Books).
5. Bloom, P. (1982) The Ecology of Freedom: the Emergence and Dissolution of Hierarchy (Writers Publishing Cooperative).