Biendl, Martin. 2009. “New International Calibration Standard (ICS-I3) for HPLC Analysis of Iso-α-Acids: Submitted on Behalf of the International Subcommittee for Isomerized Hop α-Acids Standards”. BrewingScience 62 (1/2): 25. https://brewingscience.de/index.php/brewingscience/article/view/464.