Swinbanks, D., O' Brien, J., Japan explores the boundary between food and medicine. Nature, 362, 180 (1993)
Arai, S., Global View on functional foods: Asian perspectives. Br. J. Nutr. 88, Suppl.2, S139-S143 (2002)
Bagchi, D. ed, 「Nutraceutical and Functional Food Regulations in the United States and Around the World」 (2nd Ed.). Academic Press, Elsevier Inc, (2014)