NISRINAH, Markha. Synthesis of Silica from Rice Husk Ashes with Variation of Solvent (KOH) Concentration. Journal of Natural Sciences and Mathematics Research, [S. l.], v. 3, n. 2, p. 252–254, 2017. Disponível em: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/10951. Acesso em: 7 jun. 2025.