Widyotomo, S., Mulato, S., K. Purwadaria, H. and Syarief, A. (2009) “Decaffeination process characteristic of Robusta coffee in single column reactor using ethyl acetate solvent”, Pelita Perkebunan (a Coffee and Cocoa Research Journal), 25(2). doi: 10.22302/iccri.jur.pelitaperkebunan.v25i2.133.