Igwe, C., Eloff, J.N. and van Brummelen, R. 2009. EXTRACTION, POTENTIATION AND QUANTITATIVE DETERMINATION OF RESVERATROL FROM SOUTH AFRICAN RED ’CONCORD’ GRAPE PUMICE USING ASSAY-GUIDED METHODS. African Journal of Traditional, Complementary and Alternative Medicines. 6, (May 2009), 461–462.