Hunter, J.J., H.P. Ruffner, and C.G. Volschenk. 2017. “Starch Concentrations in Grapevine Leaves, Berries and Roots and the Effect of Canopy Management”. South African Journal of Enology and Viticulture 16 (2):35-40. https://doi.org/10.21548/16-2-2270.