http://www.coloradoan.com/story/news/2017/06/17/colorado-man-seeks-smartphone-ban-kids/384206001/ [coloradoan.com]
https://www.washingtonpost.com/news/morning-mix/wp/2017/06/19/why-a-colorado-dad-is-fighting-to-make-smartphones-for-preteens-illegal/ [washingtonpost.com]
https://leg.colorado.gov/sites/default/files/2017_2018_initiative_29_initial_fiscal_impact_statement.pdf [colorado.gov]