1. Shalmashi, A., Golmohammad, F.: Solubility of caffeine in water, ethyl acetate, ethanol, carbon tetrachloride, methanol, chloroform, dichloromethane, and acetone between 298 and 323 K. Lat. Am. Appl. Res. 40(3), 283–285 (2010)
2. Vuong, Q.V., Golding, J.B., Nguyen, M.H., Roach, P.D.: Preparation of decaffeinated and high caffeine powders from green tea. Powder Technol. 233, 169–175 (2013). https://doi.org/10.1016/j.powtec.2012.09.002
3. Tello, J., Viguera, M., Calvo, L.: Extraction of caffeine from robusta coffee (Coffea canephora var. Robusta) husks using supercritical carbon dioxide. The J. Supercrit. Fluids 59, 53–60 (2011). https://doi.org/10.1016/j.supflu.2011.07.018
4. Soccol, C.R.: Resíduo de café: um substrato promissor para a produção industrial de bioprodutos com alto valor agregado. In: I SPCB - Simpósio de Pesquisa dos Cafés do Brasil, 2000. Poços de Caldas – MG. Anais de I SPCB (2000). http://www.sbicafe.ufv.br/bitstream/handle/123456789/532/166699_Art03f.pdf?sequence=1&isAllowed=y
5. CONAB, Companhia Nacional de Abastecimento. https://www.conab.gov.br/ultimas-noticias/4857-safra-de-cafe-deve-encerrar-o-ciclo-de-2022-com-uma-producao-de-50-92-milhoes-de-sacas#:~:text=A%20produ%C3%A7%C3%A3o%20cafeeira%20do%20Brasil,7%25%20acima%20da%20safra%202021. (2022). Accessed 03 Dec 2022