Sari, Y. W., Z. R. . Attar, and W. Widyarani. “EGGSHELL CALCIUM NANOPARTICLES: A SUSTAINABLE APPROACH TO BOOST BIOGAS PRODUCTION FROM TOFU LIQUID WASTE”. Indonesian Physical Review, vol. 7, no. 3, Aug. 2024, pp. 414-28, doi:10.29303/ipr.v7i3.350.