1. Aborn M. (1983), ‘Recollections and views of key figures in the social indicators program’, Items 37/4 (December).
2. Albrecht, G. and R. Fitzpatrick: 1994, Quality of Life in Health Care, volume V of Advances in Medical Sociology.
3. American Demographics: 2002, ‘Futurespeak: Science’s potential to create new markets’, American Demographics, May, p. 49.
4. Modernization in Hungary in the long and short run measured by social indicators