Rojali, Suparmin, Desembra Lisa, and Indah Restiaty. “Utilization of Liquid Waste from Tofu Production Using Anaerobic Methods for Biogas ”. Gema Lingkungan Kesehatan 22, no. 2 (August 2, 2023): 95–102. Accessed August 15, 2025. https://gelinkes.poltekkes-surabaya.ac.id/index.php/gelinkes/article/view/185.