1. Health benefits of coffee: Myth or reality;Alves;Química Nova,2009
2. Instant Coffee;Clarke,1987
3. Coffee and Health: Composition, Consumption and Effect upon Health;Debry,1994
4. EEC (2008). Commission Directive 2008/100/EC of 28 October 2008, amending Council Directive 90/496/EEC on nutrition labelling for foodstuffs as regards recommended daily allowances, energy conversion factors and definitions. Official Journal of the European Union, L 285/9.
5. EMEA (2008). Guideline on the specification limits for residue of metal catalysts or metal reagents, Doc. Ref. EMEA/CHMP/SWP/4446/2000, p.22, EMEA - European Medicines Agency. London, UK.