- Veenhoven, R.
- World Database of Happiness. Continuous Register of Research on Subjective Appreciation of Life.
- Glatzer, W.; Von Below,S.; Stoffregen, M.; Eds.: "Challenges for Quality of Life in the Contemporary World", Kluwer, 2004, Dordrecht, Netherlands, 75 - 89
Eligible for inclusion in findings archive
- No, no new data on present happiness.