Setyawan, B., ., T. and Mitrowihardjo, S. (2016) “Determination of Selection Index of Cocoa (Theobroma cacao L.) Yield Traits Using Regression Methods”, Pelita Perkebunan (a Coffee and Cocoa Research Journal), 32(2), pp. 101-108. doi: 10.22302/iccri.jur.pelitaperkebunan.v32i2.229.