T. V. Kotereva, V. A. Gavva, V. A. Lipsky, A. V. Nezhdanov, Yu. S. Belozerov, A. D. Bulanov, V. G. Plotnichenko, “Refractive index dispersion and Raman scattering spectra of a germanium single crystal enriched with $^{70}$Ge isotope”, Optics and Spectroscopy, 133:7 (2025), 734–740
