1. World Cancer Research Fund and American Institute For Cancer Research (1997) in Food Nutrition and the Prevention of Cancer: A Global Perspective, World Cancer Research Fund and American Institute For Cancer Research
2. Alink, G.M. and Bueno-de Mesquita, H.B. (1997) in Food and Cancer Prevention II (Alink, G.M., Bueno-de Mesquita, H.B., eds), Elsevier Science Ireland Ltd
3. Role and Different Types of Vegetables and Fruit in the Prevention of Cancer of the Colon, Rectum and Breast;Franceschi;Epidemiology,1998
4. Increased Consumption of Fruits and Vegetables within the EU: Potential Health Benefits’ in European Research towards Safer and Better Food;Southon,1998
5. Boyce, N. (1999) ‘Unknown quantity’ in New Scientist 27 Feb., 18–19