1. Achatz, T. and W. Jagodzinski 1988. Lebenszyklischer Wandel zum Materialismus oder Generationenwandel zum Postmaterialismus? Unpublished paper.
2. Barnes, S. H., Kaase, M. et al. 1979. Political Action: Mass Participation in Five Western Democracies, Beverly Hills: Sage.
3. Böltken, F. and W. Jagodzinski 1982. Postmaterialism in the European Community 1970–1980: Insecure Value Orientations in an Environment of Insecurity, Paper presented at the 1982 meeting of the European consortium for Political Research, Aarhus, Denmark.
4. Böltken, F. and W. Jagodzinski 1985. Insecure Value Orientations in an Environment of Insecurity, Comparative Political Studies 17: 453–484.
5. Dalton, R. J. 1981. The Persistence of Values and Life-cycle Changes, in H.-D. Klingemann and M. Kaase (eds.): Politische Psychologie (Sonderheft 12 der PVS–Politische Vierteljahresschrift), Opladen: Westdeutscher Verlag, 189–207.