1. Balch PA, Balch JF (eds) (2000) In Prescription for Nutritional Healing. Avery, Penguin Putnam Inc.: New York. pp 42–52.
2. Bassit RA, Sawada LA, Bacurau RF (2002). Branched chain amino acid supplementation and the immune response of long-distance athletes. Nutrition 18, 376–379.
3. Bremer HJ, Duran M, Kamerling JP, Przyrembel H, Wadman SK (1981) In Disturbances of Amino Acid Metabolism: Clinical Chemistry and Diagnosis. Urban and Schwarzenberg Baltimore: Munich. pp 525.
4. Budd MA, Tanaka K, Holmes LB, Efron ML, Crawford JD, Isselbacher KJ (1967). Isovaleric academia. Clinical features of a new genetic defect of leucine metabolism. N Engl J Med 277, 321–327.
5. Chalmers RA, Lawson AM (1982) In: Organic Acids in Man. Analytical Chemistry, Biochemistry and Diagnosis of the Organic Aciduria. Chapman and Hall: New York. pp 523.