van Zyl, S., M.A. Vivier, and M.A. Walker. “Xiphinema Index and Its Relationship to Grapevines: A Review”. South African Journal of Enology and Viticulture 33, no. 1 (November 15, 2016): 21–32. Accessed February 20, 2026. https://www.journals.ac.za/sajev/article/view/1302.