Steven S, Restiawaty E, Bindar Y. Operating Variables on Production of High Purity Bio-silica from Rice Hull Ash by Extraction Process. J. Eng. Technol. Sci. [Internet]. 2022May20 [cited 2024Sep.8];54(3):220304. Available from: https://journals.itb.ac.id/index.php/jets/article/view/15279