“Morphological Characterization and Identification of Coffea liberica Callus of Somatic Embryogenesis Propagation”. (2015) Pelita Perkebunan (a Coffee and Cocoa Research Journal), 31(2), pp. 81–89. Available at: https://mail.ccrjournal.com/index.php/ccrj/article/view/ (Accessed: 1 May 2026).