Optimization of Pretreatment and Hydrothermal Process of Na-X Zeolite from Kaolin and Metakaolin. Jurnal Kimia Valensi, [S. l.], v. 5, n. 2, p. 202–210, 2019. DOI: 10.15408/jkv.v5i2.11326. Disponível em: https://journal.uinjkt.ac.id/valensi/article/view/11326. Acesso em: 14 oct. 2025.