Swanepoel, J.J., and C.E. de Villiers. “A Numerical-Taxonomic Classification of Vitis Spp and Cultivars Based on Leaf Characteristics”. South African Journal of Enology and Viticulture 8, no. 2 (May 8, 2017): 31–35. Accessed February 28, 2026. https://www.journals.ac.za/sajev/article/view/2311.