Dr. Michael Colgan. "Optimum Sports Nutrition". 1993.
J.I. Rader, C. M. Weaver, G. Angyal. "Total folate in enriched cereal grain products in the United States following fortification". 2000 Food Chemistry 70 Pg. 275 - 289
J.I. Rader, C. M. Weaver, G. Angyal. "Use of a microbiological assay with tri-enzyme extraction for measurement of pre-fortification levels of folates in enriched cereal-grain products". 1998 Food Chemistry 62 4 Pg. 451 - 465
J. W. DeVries, P.M. Keagy, C.A. Hudson, J.I. Rader. "AACC collaborative study of a method for determining total folate in cereal products -- microbiological assay using trienzyme extraction (AACC method 86-47)". 2001 Cereal Foods World 46 5 Pg. 216 - 219
Nutrient Data Laboratory, ARS, USDA. "National Food and Nutrient Analysis Program Wave 6m". 2002 Beltsville MD
National Institutes of Health (NIH). "Carotenoid analyses of U.S. foods, Food Composition Laboratory". 1997
Nutrient Data Laboratory, ARS, USDA. "Analysis of carotenoids in selected foods.". 2002 Beltsville MD
Nutrient Data Laboratory, ARS, USDA. "National Food and Nutrient Analysis Program, Wave 9k". 2005 Beltsville MD
Nutrient Data Laboratory, ARS, USDA. "Dietary Fiber and Sugars in Commonly Consumed Foods". 1994 Beltsville MD