du Toit, P., P. Dry, and B. Loveys. “A Preliminary Investigation on Partial Rootzone Drying (PRD) Effects on Grapevine Performance, Nitrogen Assimilation and Berry Composition”. South African Journal of Enology and Viticulture, vol. 24, no. 2, Oct. 2017, pp. 43-54, doi:10.21548/24-2-2637.