Optimization study of ultrasound-assisted polyphenol extraction from cocoa powder and utilization of its grounds using papain solution. Pelita Perkebunan (a Coffee and Cocoa Research Journal), [S. l.], v. 32, n. 1, p. 22–33, 2016. Disponível em: https://www.ccrjournal.com/index.php/ccrj/article/view/. Acesso em: 29 apr. 2026.