1. Brennan, Geoffrey, and James Buchanan (1990), The Power to Tax, Cambridge, Mass.: Cambridge University Press.
2. Breton, A. and A. D. Scott (1978), The Economic Constitution of Federal States, Toronto: University of Toronto Press.
3. Buchanan, J. M. and G. Tullock (1962), The Calculus of Consent, Ann Arbor: University of Michigan Press.
4. Cornes, R. and T. Sandler (1986), The Theory of Externalities, Public Goods and Club Goods, Cambridge: Cambridge University Press.
5. Downs, Anthony (1957), An Economic Theory of Democracy, New York: Harper & Row.