1. In U.S., 5% Consider Themselves Vegetarianshttp://www.gallup.com/poll/156215/Consider-Themselves-Vegetarians.aspx
2. How Many Adults in the U.S. Are Vegetarian and Vegan?http://www.vrg.org/nutshell/Polls/2016_adults_veg.htm
3. Vegetarianism: Movement or Moment?;Maurer,2002
4. The Carnism Inventory: Measuring the ideology of eating animals
5. Vegetarianism. A blossoming field of study