1. Prasad, R. N. B. Walnuts and pecans. InEncyclopedia of food science and technology;Macrae, R., Robinson, R. K., Sadler, M. J., Eds.Academic Press:London,1993;Vol. 7, pp4828–4834.
2. Duke, J. A.Handbook of nuts;CRC Press:Boca Raton, FL,2001; pp69–72.
3. USDA. National Nutrient Database for Standard Reference, Release 19,Agricultural Research Service, U.S. Department of Agriculture,2006.
4. USDA. Fruit and Tree Nuts Situation and Outlook Yearbook/FTS2006/October 2006,Economic Research Service, U.S. Department of Agriculture,2006.