“Various Roasting Characteristics Against Alteration of Antioxidant Activity, Amino Acids Content, and Flavor of Java Ijen-Raung Coffee Beans”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), vol. 39, no. 3, Dec. 2023, pp. 216-29, https://mail.ccrjournal.com/index.php/ccrj/article/view/563.