Biendl, M. “New International Calibration Standard (ICS-T3) for HPLC Analysis of Tetrahydroiso-Alpha-Acids. - Submitted on Behalf of the International Committee for Hop Standards”. BrewingScience, vol. 66, no. 9/10, Oct. 2013, p. 135, https://brewingscience.de/index.php/brewingscience/article/view/360.