1. Anonymous. (2000a). Gesundheit braucht Konzepte. Lebensmittelzeitung, 52(26), 42–44
2. Anonymous. (2000b). The European probiotic and prebiotic functional dairy food market. Frankfurt: Frost and Sullivan
3. Anonymous. (2001). Datamonitor, Worldwide Innovations Network. http://www.datamonitor.com
4. Bech-Larsen, T., Grunert, K. G., Poulsen, J. B. (2001). The acceptance of functional foods in Denmark, Finland and the United States. MAPP working paper 73. The Aarhus School on Business