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Semmer, N. K.; Widmer, P. S. (September 2012). Challenge-stressors, stress-symptoms, and self-esteem (Unpublished). In: 48th Conference of the German Psychological Society. Bielefeld. 09.2012.
Widmer, P. S.; Gardner, D. H.; Semmer, N. K. (June 2012). Challenge stressors, well-being, and attitudes: A three-wave study. In: 3rd Biennial IWP International Conference 2012 on Work, Wellbeing and Performance. Sheffield. 06.2012.
Semmer, N. K.; Widmer, P. S. (2012). Challenge-Stressoren, Stress-Symptome und Selbstwert (Unpublished). In: 48. Conference of the German Association of Psychology. Bielefeld. 2012.
