http://www.bridgingthegapresearch.org/_asset/13s2jm/WP_2013_report.pdf

Chriqui J.F., Resnick E.A, Schneider L., Schermbeck R., Adcock T., Carrion V., Chaloupka F.J. "School District Wellness Policies: Evaluating Progress and Potential for Improving Children’s Health Five Years after the Federal Mandate. School Years 2006–07 through 2010-11." Volume 3. Chicago, IL: Bridging the Gap Program, Health Policy Center, Institute for Health Research and Policy, University of Illinois at Chicago, 2013.