SUKANDAR, S.; SURIPTO, P. M. Evaluation of Environmental Impact and Social Return on Investment (SROI) from Fly Ash Utilization as Fertilizer at PT PLN Nusantara Power UPK Tarahan. ITB Graduate School Conference, [S. l.], v. 5, n. 1, 2025. Disponível em: https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/531. Acesso em: 20 aug. 2026.