Linsenmeier, A.W., and O. Löhnertz. 2016. “Changes in Norisoprenoid Levels With Long-Term Nitrogen Fertilisation in Different Vintages of Vitis Vinifera Var. Riesling Wines”. South African Journal of Enology and Viticulture 28 (1):17-24. https://doi.org/10.21548/28-1-1455.