Graf, Tobias, Michael Beck, Michael Mauermeier, Daniel Ismann, Johann Portner, Peter Doleschel, and Urs Schmidhalter. “Humulus Lupulus – The Hidden Half”. BrewingScience 67, no. 11/12 (December 19, 2014): 161–166. Accessed June 14, 2026. https://brewingscience.de/index.php/brewingscience/article/view/376.