De La Harpe, A. C., and J. H. Visser. “The Determination of the Homogeneity of a Vitis Vinif Era L. Cv. Cape Riesling Vineyard”. South African Journal of Enology and Viticulture 4, no. 2 (May 11, 2017): 77–87. Accessed February 28, 2026. https://www.journals.ac.za/sajev/article/view/2373.