1. D.H. Meadows, D.L. Meadows, J.R.W. Behrene III, The Limit to Growth, MIT Press, Boston, 1972
2. Kee Hyong Kim (Ed.), 21st Century, Prospect and Problems, Kyung Hee University Press, Seoul, 1980
3. Lester R. Brown et al., State of The World 1996 Worldwatch Institute, W.W. Norton, New York, 1996
4. Lester C. Thurow, The Future of Capitalism, William Morrow, New York, 1996, p. 91
5. John Horgan, The End of Science, Broadway Books, New York, 1997, p. 193