Ishlah, T. ., M. R. . Parningotan, R. S. . Nugraha, T. . Handayani, H. . Zahra, and E. Ernowo. “Mineralogy and Provenance of Titanium-Vanadium Bearing Iron Sand Deposits from Purworejo-Kebumen, and Cilacap, Central Java”. Journal of Mathematical and Fundamental Sciences, vol. 56, no. 1, Oct. 2024, pp. 48-67, doi:10.5614/j.math.fund.sci.2024.56.1.4.