1. Oxygen free radical scavenging abilities of vitamins C and E, and a grape seed proanthocyanidin extract in vitro;Bagchi;Research Communications in Molecular Pathology and Pharmacology,1997
2. Superoxide dismutase: improved assays and an assay applicable to acrylamide gels;Beauchamp;Analytical Biochemistry,1971
3. Fruit, vegetable and cancer prevention: a review of the epidemiological evidence;Block;Nutrition and Cancer,1992
4. Duncan, K. W., & Gilmour, I. A. (1999). Process for extraction of proanthocyanidins from botanical material. Patent Number 5,968,517. 19 October, 1999.
5. Mammalian metabolism of flavonoids;Griffiths,1982