1. Inman, R., 1987, Markets, Government and the “New” Political Economy, in: Auerbach, A.J., Feldstein, M., (eds.), Handbook of Public Economics, Vol II, Elsevier, 647–778.
2. Frank, R., 1988, Passions Within Reasons. The Strategic Role of the Emotions, New York, London.
3. Kreps, D. J., Milgrom, J., Robert, J., Wilson, R., 1974, Rational Cooperation in the Finitely Repeated Prisoners' Dilemma, Journal of Economic Theory, 27, 245–252.
4. Andreoni, J., 1988, Why Free Ride? Strategie and Learning in Public Good Experiments, Journal of Public Economics, 37, 291–304.
5. Gächter, S., Fischbacher U., Heterogeneous social preferences and the dynamics of free riding in public goods” CeDEx Discussion Paper Series No. 2006–1, January 2006.