Štěrba, Karel, Pavel Čejka, and Jana Olšovská. “Influence of Beer and Wort Sample Freezing on the Result of Analysis”. KVASNY PRUMYSL 66, no. 4 (July 31, 2020): 307-313. Accessed September 18, 2020. http://kvasnyprumysl.eu/index.php/kp/article/view/225.