1. Morgan R. The slow but steady rise of vegetarianism in Australia. 2016 Aug 15 [cited 23 Jan 2017]. Roy Moran Research. http://roymorgan.com/findings/vegetarianisms-slow-but-steady-rise-in-australia-201608151105.
2. Consumption of special diet among Finnish adolescents in 1979–2001: repeated national cross-sectional surveys;H Kosonen;International Journal of Public Health,2005
3. Bates B, Lennox A, Bates C, Swan G. National Diet and Nutrition Survey. 2009 [cited 23 Jan 2017] United Kingdom: Department of Health, Food Standards Agency. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/216484/dh_128550.pdf.
4. Health, ethics and environment: A qualitative study of vegetarian motivations;N Fox;Appetite,2008
5. Vegan diet: motives, approach and duration;P Kersche-Risch;Ernahrungs Umschau,2015