1. Cole J. Guidance regarding marijuana enforcement. Memorandum, US Department of Justice, Office of the Deputy Attorney General. Washington, D.C. 20530. (29 August 2013). Available at: http://www.justice.gov/iso/opa/resources/3052013829132756857467.pdf
2. Altered State? Assessing How Marijuana Legalization in California Could Influence Marijuana Consumption and Public Budgets
3. Caulkins JP, Hawken A, Kilmer B, Kleiman A, Pfrommer K, Pruess J, Shaw T. High tax states: options for gleaning revenue from legal cannabis. Or L Rev 2103;91:1041-1047
4. Design considerations for legalizing cannabis: lessons inspired by analysis of California's Proposition 19