Widyotomo, S., Ahmad, H., Soekarno, S. and Mulato, S. (2011) “Performance of a Horizontal Triple Cylinder Type Pulping Machine”, Pelita Perkebunan (a Coffee and Cocoa Research Journal), 27(1). doi: 10.22302/iccri.jur.pelitaperkebunan.v27i1.144.