Marais, J., van Wyk, C. and Rapp, A. (2017) “Effect of Sunlight and Shade on N orisoprenoid Levels in Maturing Weisser Riesling and Chenin blanc Grapes and Weisser Riesling Wines”, South African Journal of Enology and Viticulture, 13(1), pp. 23–32. doi: 10.21548/13-1-2191.