1. 1) S. Sugimoto: "Recent Trend of the Researches for Reducing Dysprosium Usage in a Nd–Fe–B Sintered Magnet", J. Jpn. Soc. Powder Powder Metallurgy, 57 (2010) 395-400.
2. 2) S. Hirosawa, T. Nishiuchi, T. Ohkubo, W. F. Li, K. Hono, J. Yamasaki, M. Takezawa, K. Sumiyama, S. Yamamuro: "Purpose and Objectives of “Project for High Performance Anisotropic Nanocomposite Permanent Magnets with Low Rare-Earth Content", J. Japan Inst. Metals, 73 (2009) 135-140.
3. 3) M. Takezawa, N. Tani, Y. Nagashima, Y. Morimoto, J. Yamasaki, N. Nozawa, T. Nishiuchi, S. Hirosawa: "Magnetic Domain Observation of Nd–Fe–B Magnets with Submicron-Sized Grains by High-Resolution Kerr Microscopy", J. Appl. Phys., 109 (2011) 07A709.
4. 4) M. Takezawa, Y. Nagashima, Y. Kimura, Y. Morimoto, J. Yamasaki, N. Nozawa, T. Nishiuchi, S. Hirosawa: "Magnetic Domain Observation of Nd–Cu–Diffused Nd–Fe–B Magnets with Submicron Grains by Kerr Effect Microscopy", J. Appl. Phys., 111 (2012) 07A714.
5. 5) M. Takezawa, Y. Kimura, Y. Morimoto, J. Yamasaki: "Analysis of Magnetization Reversal Process of Nd–Fe–B Sintered Magnets by Magnetic Domain Observation Using Kerr Microscope", IEEE Trans. Magn., 49 (2013) 3262-3264.