T. Schleicher, Q. Smejkal, A. Martin, W. Russ, and M. Faulstich, “Influences of the Type of Fluxing Agent during Fluxcalcination of Kieselguhr on Formation of Crystalline Phases, Permeability and Colour”, BrSc, vol. 62, no. 5/6, pp. 67–82, Jun. 2009, Accessed: May 30, 2026. [Online]. Available: https://brewingscience.de/index.php/brewingscience/article/view/469