Tenge, Ch., M. Nagel, U. Wellhoener, and F. Jacob. “Influence Of Yeast Propagation In High-Gravity Wort On Subsequent Fermentation Performance”. BrewingScience 59, no. 1/2 (February 28, 2006): 41–44. Accessed June 25, 2026. https://brewingscience.de/index.php/brewingscience/article/view/524.