M. Biendl, M. Virant, and P. Varjú, “Determination of iso-alpha-acids, alpha- and beta-acids in isomerised hop pellets by HPLC: Submitted on behalf of the EBC Analysis Committee”, BrSc, vol. 57, no. 7/8, pp. 54–55, Aug. 2004, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/556