“Whole Cell Immobilization of Antibacterial Biosurfactant Producing Bacteria in Oil Palm Empty Fruit Bunch (OPEFB)”. PROSISI: Prosiding Seminar Nasional Saintek, vol. 1, no. 1, July 2026, pp. 261-72, http://proceeding.unuha.ac.id/index.php/saintek/article/view/9.