2) K. Watanabe: “Liquid helium-free superconducting magnets”, J. Cryo. Soc. Jpn. 34 (1999) 179-187 (in Japanese)
渡辺和雄:「液体ヘリウムフリー超伝導マグネット」,低温工学34 (1999) 179-187
3) M. Morita, K. Miyamoto, K. Doi, M. Murakami, K. Sawano and S. Matsuda: "Processing and superconducting properties of high-Jc bulk YBaCuO prepapred by melt process", Physica C 172 (1990) 383-387