Dr. Michael Colgan. "Optimum Sports Nutrition". 1993.
K. Bhaskarachary, D.S. Sankar Rao, Y.G. Deosthale, Vinodini Reddy. "Carotene content of some common and less familiar foods of plant origin.". 1995 Food Chemistry 54 Pg. 189 - 193
A.V. Lentoc, L.B. Dimannahan, O.N. Gonzalez. "Vitamin B6 Content of Some Phillipine Foods. Raw Foods". 1971 Philippine Journal of Nutrition 24 Pg. 209
D.M. R. Ramos, D B Rodriguez. "Determination of the vitamin A value of common Brazilian leafy vegetables.". 1987 J. Micronutrient Analysis 3 Pg. 147 - 155
A.J. Speek, S. Speek-Saichua, W.H. P. Schreurs. "Total carotenoid and B-carotene contents of Thai vegetables and the effect of processing.". 1988 Food Chemistry 27 Pg. 245 - 257
E-Siong Tee, Chin-Lam Lim. "Carotenoid composition and content of Malaysian vegetables and fruits by the AOAC and HPLC methods.". 1991 Food Chemistry 41 Pg. 309 - 339