“Condition of Soil Fertility and Sensory Profile of Smallholder Robusta Coffee in Jember District” (2016) Pelita Perkebunan (a Coffee and Cocoa Research Journal), 32(3), pp. 192–197. Available at: https://www.ccrjournal.com/index.php/ccrj/article/view/ (Accessed: 1 May 2026).