Setyawan, B., and A. Wahyu Susilo. “Selection of Prospective Drought-Tolerant Cocoa Hybrids Based on Additive Main Effect and Multiplicative Interaction Analyses”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 33, no. 2, Aug. 2017, pp. 89-96, doi:10.22302/iccri.jur.pelitaperkebunan.v33i2.262.