Hulupi, Retno, Nasrullah ., and Soemartono . “Inheritance of Arabica Coffee Resistance to Radopholus SimilisCobb.”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 23, no. 1 (May 1, 2007). Accessed September 30, 2022. https://ccrjournal.com/index.php/ccrj/article/view/53.