- Gander, F.; Hofmann, J.; Proyer, R.T.; Ruch, W.
- Character Strengths – Stability, Change, and Relationships with Well-Being Changes
- Applied Research in Quality of Life, 2020, Vol. 15, 349 - 367
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.