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Karl, Florian M., Jennifer Smith, Shannon Piedt, Kate Turcotte, e Ian Pike. "Applying the Health Action Process Approach to Bicycle Helmet Use and Evaluating a Social Marketing Campaign." Inj Prev 2018.

Karl, Florian M., et al. "Applying the Health Action Process Approach to Bicycle Helmet Use and Evaluating a Social Marketing Campaign." Inj Prev 2018.