1. Influence of extraction temperature on the final quality of espresso coffee;Andueza;Journal of the Science of Food and Agriculture Chemistry,2003
2. Aroma Chemicals. (2015). (Indesso) Retrieved March 27, 2018, from https://www.indesso.com/?page_id=1567.
3. Caffeine content in coffee as influence by grinding and brewing techniques;Bell;Food Research International,1997
4. The Grind – Particles and Particularities;Blittersdorff,2017
5. Optimization of espresso machine parameters through the analysis of coffee odorants by HS-SPME-GC/MS;Caprioli;Food Chemistry,2012