Widyotomo, Sukrisno, Hadi K. Purwadaria, and Atjeng M. Syarief. “Development of Mathematic Model for Coffee Decaffeination With Leaching Method”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 27, no. 2 (August 31, 2011). Accessed November 27, 2021. https://ccrjournal.com/index.php/ccrj/article/view/150.