[1]
D. Kurniawidi, K. Saputra, T. Ardianto, R. Inayah, and I. Aminy, “UV-Vis Spectroscopic Analysis for Band Gap Determination of Cobalt-Doped Magnetite (Fe2.5Co0.5O4) Nanoparticles Derived from Natural Iron Sand”, KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA, vol. 10, no. 2, pp. 115-125, May 2026.