Denning, Brannon P., Samantha Graff, and Heather Wooten. 2010. “Laws to Require Purchase of Locally Grown Food and Constitutional Limits on State and Local Government: Suggestions for Policymakers and Advocates”. Journal of Agriculture, Food Systems, and Community Development 1 (1), 139-48. https://doi.org/10.5304/jafscd.2010.011.014.