1. Anderson, J. 1777. An Inquiry into the Nature of the Corn-Laws; with a View to the New Corn-Bill proposed for Scotland. Edinburgh.
2. Jevons, W.S. 1871. The theory of political economy. Harmondsworth: Penguin, 1970.
3. Marshall, A. 1890. Principles of economics, 8th ed. London: Macmillan, 1972.
4. Montani, G. 1972. La teoria ricardiana della rendita. L’Industria 3/4: 221–243.
5. Montani, G. 1975. Scarce natural resources and income distribution. Metroeconomica 27: 68–101.