1. K. Kobayashi, Now & Future
4 (1992) 4.
2. G. M. Savage, Chemistry & Industry
20 July (1992) 525.
3. E. Fitzer, Carbon
25 (1987) 163.
4. W. N. Reynolds, “Physical properties of graphite” (American Elsevier Publishing Company, New York, 1968).
5. D. W. Mckee, Carbon
24 (1986) 737.