Košin, Petr, Jan Šavel, and Adam Brož. “Vertical Refractometer for the Monitoring of Main Fermentation”. KVASNY PRUMYSL 62, no. 3 (March 5, 2016): 90–93. Accessed May 3, 2024. https://kvasnyprumysl.eu/index.php/kp/article/view/115.