Carver(S) (C), Scheier (F)(M), (1992), Effects of optimism on psychological and physical well-being: Theoretical overview and empirical update, Journal of cognitive Therapy and Research, volume16, 201-228.
Wolf (M) (T), (1994) Stress, coping and health: enhancing well-being during medical school, Journal of community psychology, volume 28, issue 1,8-17.