Hunter, J.J., Q.T. de Villiers, and J.E. Watts. “The Effect of Partial Defoliation on Quality Characteristics of Vitis Vinifera L. Cv. Cabernet Sauvignon Grapes 1. Sugars, Acids and PH”. South African Journal of Enology and Viticulture 12, no. 1 (May 4, 2017): 42–50. Accessed February 20, 2026. https://www.journals.ac.za/sajev/article/view/2227.