Seo SY, Ryu C, Ahn YJ, Yu H, Kim JB.  Estimation of the Refractive Index of the Outer Core Using the Relationship Between the Shadow Zone Distance of Seismic Waves and the Minimum Angle of Deviation of a Prism.  New Phys.: Sae Mulli 2025;75:156-164.  https://doi.org/10.3938/NPSM.75.156