M. Biendl and B. Foster, “New International Calibration Standards (ICS-Hum1, ICS-X1) for HPLC Analysis of Humulinones and Xanthohumol: Submitted on behalf of the International Hop Standards Committee”, BrSc, vol. 71, no. 9/10, p. 81, Oct. 2018, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/271