M. Biendl, “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”, BrSc, vol. 62, no. 1/2, p. 25, Feb. 2009, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/464