dharmawan, A., S. Widyotomo, H. Firmanto, and B. Setyo Abdurizal. “Formulation of Decaffeinated Instant Coffee Effervescent Tablet”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 32, no. 3, Dec. 2016, pp. 206-22, doi:10.22302/iccri.jur.pelitaperkebunan.v32i3.242.