Saktioto, Toto, Suhardi Suhardi, Defrianto Defrianto, Dewi Indriyani Roslim, and Awitdrus Awitdrus. 2019. “Stimulating Ion Flow in Oil Palm Leaves and Midribs Applying Electrical Potential Difference”. Kuwait Journal of Science 46 (1). https://journalskuwait.org/kjs/index.php/KJS/article/view/3784.