3 Sun Daku; Liu Yujin, Proc. 5th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Roanoke, Virginia. (USA), June, 1981, p. 525．
[4]
4 Yoneyama, T.; Fukuno, A.; Ojima, T., Proc. 4th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Hakome National Park, Jpn., May, 1979, p.407．
[5]
5 Shimoda, T.; Okonogi, I; Teraishi, K., Proc, 5th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Roanoke, Virginia(USA), June, 1981, p.595．
[6]
6 Mishra, R. K.; Thomas, G., Proc. 4th Int. Workshop on Rare Earth-Cobalt Permanent Magnets and Their Application, Hakone National Park, Jpn., May. 1979, p.301．
