Zen NA, Permatasari I, Hikmah I, Yuliantoro P, Rahmawati D. UTILIZATION OF ULTRASONIC WAVE IN THE PRODUCTION OF REDUCED GRAPHENE OXIDE FROM COCONUT SHELL BIOMASS: ECO-FRIENDLY AND SUSTAINABLE APPROACH. IPR [Internet]. 2025Mar.12 [cited 2025Apr.3];8(2):391-9. Available from: https://ipr.unram.ac.id/index.php/ipr/article/view/434