1. Historical development of vegetarianism;Whorton;Am J Clin Nutr,1994
2. Health effects and prevalence of vegetarianism;White;West J Med,1994
3. Dietary guidelines: vegetarian diet position paper (UK);British Dietetic Association;Int J Veg Nutr,1997
4. Prevalence of vegetarians in Swedish secondary schools;Larsson;Scand J Nutr,1997