Marais, J., and A Rapp. 2017. “The Selection of Aroma-Rich Clones of Vitis Vinifera L. Cv. Gewtirztraminer and Weisser Riesling by Means of Terpene Analyses”. South African Journal of Enology and Viticulture 12 (1):51-56. https://doi.org/10.21548/12-1-2229.