Marais, J., and A. Rapp. “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, vol. 12, no. 1, May 2017, pp. 51-56, doi:10.21548/12-1-2229.