1. Beckerman, W., 1994. Sustainable development: is it a useful concept? Environmental Values, 4: 191–209.
2. Beckerman, W., 1995. How would you like your 'sustainability', sir? Weak or strong? A reply to my critics. Environmental Values, 4: 169–179.
3. von Böhm-Bawerk, E., 1921a. Geschichte und Kritik der Kapitalzins-Theorien. 4th ed. Anton Hain, Meisenheim/Glan.
4. von Böhm-Bawerk, E., 1921b. Positive Theorie des Kapitals. 4th ed. Gustav Fischer, Jena.
5. Boulding, K.E., 1973. The Economics of the Coming Spaceship Earth. In: H.E. Daly (Editor), Toward a Steady State Economy. Freeman, San Francisco, pp. 121–132.