Otieno, S. O., Kengara, F. O., Kemmegne-Mbouguen, J. C., Langmi, H. W., Kowenje, C. B., & Mokaya, R. (2019). The effects of metakaolinization and fused-metakaolinization on zeolites from quartz rich natural clays. Microporous and Mesoporous Materials, 290, Article 109668. https://doi.org/10.1016/j.micromeso.2019.109668