1. The Ages of Gaia: A Biography of Our Living Earth;Lovelock,2000
2. Economics for a Full Worldhttp://www.greattransition.org/publication/economics-for-a-full-world
3. An Essay on the Principle of Population;Malthus,1798
4. Collected Papers of Kenneth Boulding;Boulding,1971
5. The Coal Question;Jevons,1865