Anom Wijaya, K., A. Prawoto, and S. Ihromi. “Induction of Cocoa Natural Resistancy to Cocoa Pod Borer by Silica Application”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 25, no. 3, Dec. 2009, doi:10.22302/iccri.jur.pelitaperkebunan.v25i3.113.