Kupetz M, Geißinger C, Gastl M, Becker T. Comparison of Dumas and Kjeldahl Method for Nitrogen Determination in Malt, Wort and Beer. BrSc [Internet]. 2018 Apr. 30 [cited 2026 Jun. 15];71(3/4):18-23. Available from: https://brewingscience.de/index.php/brewingscience/article/view/262