Haslbeck, Korbinian, et al. “Characterization of the Unfertilized and Fertilized Hop Varieties Progress and Hallertauer Tradition – Analysis of Free and Glycosidic-Bound Flavor Compounds and β-Glucosidase Activity”. BrewingScience, vol. 70, no. 11/12, Dec. 2017, pp. 148-5, https://doi.org/10.23763/BrSc17-15haslbeck.