MacNamara, K., C.J. van Wyk, O.P.H. Augustyn, and A. Rapp. 2017. “Flavour Components of Whiskey. II Ageing Changes in the High-Volatility Fraction”. South African Journal of Enology and Viticulture 22 (2):75-81. https://doi.org/10.21548/22-2-2196.