1. Kritische Lebensereignisse;Filipp,1995
2. Coping with undesirable life events;Silver,1980
3. A cognitive theory of avoidance learning;Seligman,1973
4. Anxiety disorders and phobias. A cognitive perspective;Beck,1985
5. Self-efficacy: toward a unifying theory of behavioral change;Bandura;Psychol Rev,1977