Ahmad, A. L., Sani, N. A. A., & Zein, S. H. S. (2011). Influence of calcination temperature and perovskite concentration on the morphology, gas permeance and selectivity of perovskite-titania membranes. Journal of ceramic science and technology an international journal reporting on the synthesis, structure and properties of ceramics, 2(1), 9-14. https://doi.org/10.4416/JCST2010-00026