Glück und glücklicher sein - Einführung
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· Havas, David A.; Glenberg, Arthur M.; Gutowski, Karol A.; Lucarelli, Mark J.; Davidson, Richard J. (2010): Cosmetic use of botulinum toxin-a affects processing of emotional language. In: Psychological science 21 (7), S. 895–900. DOI: 10.1177/0956797610374742.
· Strack, F.; Martin, L. L.; Stepper, S. (1988): Inhibiting and facilitating conditions of the human smile: a nonobtrusive test of the facial feedback hypothesis. In: Journal of personality and social psychology 54 (5), S. 768–777. DOI: 10.1037//0022-3514.54.5.768.
· Lyubomirsky, Sonja (2007): The how of happiness. A new approach to getting the life you want. New York NY: Penguin Books.
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