Dewi, Chintya, Fitria Rahmawati, and Edi Pramono. 2022. “Synthesis of Sulfonated Polystyrene from Styrofoam Waste As Manufacturing Material Polymer Electrolyte”. ITB Graduate School Conference 2 (1):311-20. https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/91.