Stewart, O. T., Moudon, A. V., Fesinmeyer, M. D., Zhou, C., & Saelens, B. E. (2016). The association between park visitation and physical activity measured with accelerometer, GPS, and travel diary. Health Place.

Stewart, Orion T., Anne Vernez Moudon, Megan D. Fesinmeyer, Chuan Zhou, ja Brian E. Saelens. "The Association between Park Visitation and Physical Activity Measured With Accelerometer, GPS, and Travel Diary." Health Place 2016.

Stewart, Orion T., et al. "The Association between Park Visitation and Physical Activity Measured With Accelerometer, GPS, and Travel Diary." Health Place 2016.