1. Water for extraction - composition, recommendations, and treatment;Wellinger,2017
2. Home coffee brewers: specifications and test methods;SCA Standard,2022
3. Effect of Water and Coffee Acidity on Extraction. Dynamic of Coffee Bed Compaction in Espresso Type Extraction, ASIC;Fond,1995
4. Effect of certain ion combinations commonly found in potable water on rate of filtration through roasted and ground coffee;Gardner;Food Res.,1958
5. Water quality for Espresso coffee;Navarini;Food Chem.,2010