1. J. Li, T. Goto and T. Hirai, Mater. Trans. Jim, 1999, 40 (4), 314–319.
2. J. Li, T. Goto and T. Hirai, Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/J. Ceramic Soc. of Japan, 1998, 106 (1230), 194–197.
3. J. Li, T. Goto and T. Hirai, Proc. of the 1998 17th International Conference on Thermoelectrics, IEEE, Piscataway, NJ, 1998, pp. 587–590.
4. M. Mukaida, T. Goto and T. Hirai, Mater. and Manufacturing Processes, 1992, 7 (4), 625–647.
5. T. Goto, J. Li and T. Hirai, Proc. of the 1998 17th International Conference on Thermoelectrics, IEEE, Piscataway, NJ, 1998, pp. 574–577.