1. W. Rodewald, B. Wall, M. Katter, and K. Uestuener, “Top Nd–Fe–B magnets with greater than 56 MGOe energy density and 9.8 kOe coercivity,” IEEE Transactions on Magnetics,38, No. 5, 2955–2957 (2002).
2. Y. Kaneko, F. Kuniyoshi, and N. Ishigaki, “Proven technologies on high performance Nd–Fe–B sintered magnets,” J. of Alloys and Compounds,408, 1344–1349 (2006).
3. V. B. Kondrat’ev, “Global market for rare earth element,” Gorn. Prom., No. 4 (134), 48–54 (2017).
4. V. A. Kuchumov and S. S. Shumkin, “Analysis of the chemical composition of original alloy during the production of permanent magnets made of alloys of the Sm–Co system,” Nauch. Ved. SPbPU, Estest. Inzh. Nauki, No. 1, 219–225 (2017).
5. S. S. Shumkin and V. L. Shper, “Dependence of magnetic properties of permanent magnets on alloys of the Sm–Co system on starting ingot chemical composition,” Probl. Chern. Met. Materialoved., No. 2, 95–99 (2017).