1. Baumgartner, F. and Jones, B. (1993) Agendas and Instability in American Politics, Chicago: University of Chicago Press.
2. Berger, P. and Luckmann, T. (1966) The Social Construction of Reality: A Treatise in the Sociology of Knowledge, London: Penguin.
3. Chalmers, A. (1987) Qu'est-ce que la science? Paris: La Découverte.
4. Collier, D. and Collier, R. (1991) Shaping the Political Arena, Princeton: Princeton University Press.
5. Dunsire, A. (1978) Implementation in a Bureaucracy, Oxford: Martin Robertson.