S. Ahda, et al. “APPLICATION OF RIETVELD ANALYSIS TO THE MULTIPHASE CRYSTAL STRUCTURE Bi1 2K1 2TiO3 USING MOLTEN SALT SYNTHESIS”. Jurnal Sains Materi Indonesia, vol. 23, no. 2, May 2024, pp. 61-67, https://ejournal.brin.go.id/jsmi/article/view/4950.