1. T. Cheisson and E. J. Shelter, “Rare earth elements: Mendeleev’s bane, modern marvels,” Science 363 (6426), 489–493 (2019).
2. D. V. Baulin, V. E. Baulin, and A. M. Safiulina, G. A. Tsivadze, RF Patent 2352576, Byull. Izobret., No. 11 (2009).
3. A. Yu. Tsivadze, V. E. Baulin, D. V. Baulin, I. G. Tananaev, and A. M. Safiullina, RF Patent 2391349, Byull. Izobret., No. 16 (2010).
4. V. E. Baulin, D. V. Baulin, V. I. Zhilov, S. V. Demin, and A. Yu. Tsivadze, RF Patent 2485130, Byull. Izobret., No. 17 (2013).
5. V. E. Baulin, D. V. Baulin, O. V. Kovalenko, A. Yu. Tsivadze, A. N. Usolkin, Yu. A. Voroshilov, and N. G. Yakovlev, RF Patent 22489501, Byull. Izoobret., No. 22 (2013).