- http://www.theguardian.com/world/2016/apr/23/kentucky-gun-owner-gun-violence-archive-mark-bryant
- http://www.seattletimes.com/seattle-news/data/after-belfair-tragedy-a-look-at-mass-shootings-in-washington-and-us/
- http://www.slate.com/articles/news_and_politics/crime/2015/12/gun_deaths_map_how_many_people_have_died_or_been_injured_in_shootings_around.html
- http://www.wpr.org/after-2-shootings-are-declared-justified-gun-related-homicide-tally-2014-stays-22
- http://www.nj.com/opinion/index.ssf/2015/12/was_2015_the_year_of_mass_shootings_opinion.html
