M. Cvengroschová, G. Šepeľová, and D. Šmogrovičová, “Influence of pre-isomerised hop on taste and foam stability of beer”, BrSc, vol. 56, no. 11/12, pp. 206–209, Dec. 2003, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/565