Marais, J., G. Versini, C. van Wyk, and A. Rapp. “Effect of Region on Free and Bound Monoterpene and C13-N Orisoprenoid Concentrations in Weisser Riesling Wines”. South African Journal of Enology and Viticulture, vol. 13, no. 2, May 2017, pp. 71-77, doi:10.21548/13-2-2177.