1. Aguilar, J. (2018a, November 4). How would proposition 112 impact Colorado’s economy? Two sides with two different stories about well setbacks. The Denver Post. https://www.denverpost.com/2018/10/17/proposition-112-economic-impacts-jobs-taxes/
2. Aguilar, J. (2018b, October 16). Dissecting the science behind the oil and gas setbacks initiative. The Denver Post. https://www.canoncitydailyrecord.com/2018/10/16/proposition-112-dissecting-the-science-behind-the-oil-and-gas-setbacks-initiative/
3. Avery, G. (2018, October 10). See who’s spending the most on Colorado’s oil-well setback ballot fight. Denver Business Journal. https://www.bizjournals.com/denver/news/2018/10/10/colorado-proposition-112-well-setback-donors.html
4. Ballotpedia. (n.d.). Colorado proposition 112, minimum distance requirements for new oil, gas, and fracking projects. https://ballotpedia.org/Colorado_Proposition_112,_Minimum_Distance_Requirements_for_New_Oil,_Gas,_and_Fracking_Projects_Initiative_ (2018)
5. BEA. (2020, January 10). Real value added to the Gross Domestic Product (GDP) of Colorado in 2018, by industry (in billion chained 2012 U.S. dollars) [Graph]. Statista. Retrieved April 2020, from https://www-statista-com.colorado.idm.oclc.org/statistics/594399/colorado-real-gdp-by-industry/