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Cheung, Patricia C., Padra A. Franks, Michael R. Kramer, Christi M. Kay, Carolyn D. Drews-Botsch, Jean A. Welsh, and Julie A. Gazmararian. "Elementary School Physical Activity Opportunities and Physical Fitness of Students: A Statewide Cross-sectional Study of Schools." PLoS One 2019.

Cheung, Patricia C., et al. "Elementary School Physical Activity Opportunities and Physical Fitness of Students: A Statewide Cross-sectional Study of Schools." PLoS One 2019.