Simpson, Estelle, and R.P. Tracey. “Microbiological Quality, Shelf Life and Fermentation Activity of Active Dried Yeast”. South African Journal of Enology and Viticulture 7, no. 2 (May 9, 2017): 61–65. Accessed February 28, 2026. https://www.journals.ac.za/sajev/article/view/2327.