MacNamara, K., C. van Wyk, P. Brunerie, O. Augustyn, and A. Rapp. “Flavour Components of Whiskey. III. Ageing Changes in the Low-Volatility Fraction”. South African Journal of Enology and Viticulture, vol. 22, no. 2, May 2017, pp. 82-92, doi:10.21548/22-2-2199.