“Systemic Inducing Resistance on Cocoa Seedling Against Vascular Streak Dieback By Boron and Silikon Application” (2011) Pelita Perkebunan (a Coffee and Cocoa Research Journal), 27(3). Available at: https://www.ccrjournal.com/index.php/ccrj/article/view/157 (Accessed: 1 May 2026).