Simmons, R. K., van Sluijs, E. M., Hardeman, W., Sutton, S., & Griffin, S. J. (2010). Who will increase their physical activity? Predictors of change in objectively measured physical activity over 12 months in the ProActive cohort. BioMed Central.

Simmons, Rebecca K., Esther MF van Sluijs, Wendy Hardeman, Stephen Sutton, and Simon J. Griffin. Who Will Increase Their Physical Activity? Predictors of Change in Objectively Measured Physical Activity Over 12 Months in the ProActive Cohort. BioMed Central, 2010.

Simmons, Rebecca K., et al. Who Will Increase Their Physical Activity? Predictors of Change in Objectively Measured Physical Activity Over 12 Months in the ProActive Cohort. BioMed Central, 2010.