Wieland, Flurin, Alexia N. Gloess, Marco Keller, Andreas Wetzel, Stefan Schenker, and Chahan Yeretzian. 2012. “On-Line Process Control of the Roast Degree of Coffee: Highlights of Analytical Chemistry in Switzerland”. CHIMIA 66 (6):443. https://doi.org/10.2533/chimia.2012.443.