Buckee, G. K. 1994. “Determination of Iso-Alpha-, Alpha- and Beta-Acids in Hop and Isomerized Hop Extracts: A Collaborative Trial: Submitted on Behalf of the Analysis Committee of the European Brewery Convention”. BrewingScience 47 (9): 284-86. https://brewingscience.de/index.php/brewingscience/article/view/840.