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3. Buchanan, J. M. (1975). The Limits of Liberty. Chicago: University of Chicago Press.
4. Buchanan, J. M. (1977). Criteria for a Free Society: Definition, Diagnosis, and Prescription. Reprinted in Buchanan (2001, pp. 173–184).
5. Buchanan, J. M. (1981). Constitutional Restrictions on the Power of Government. Reprinted in Buchanan (2001a, pp. 44–59).