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2. Birkland, T. A., 1995, Toward a theory of focusing events and agenda change, Doctoral dissertation, Washington University.
3. Setting the Record Straight: Frame Contestation as an Advocacy Tactic
4. Knot Policy Theory
5. Brough, A. R., 2017, Men resist green behavior as unmanly. Scientific American, 26 December. Available at https://www.scientificamerican.com/article/men-resist-green-behavior-as-unmanly/