1. D. M. Riggs, R. J. Shuford andR. W. Lewis, in ?Handbook of Composites?, edited by G. Lubin (Van Nostrand Reinhold, New York, 1982) p. 196.
2. J. Delmonte, ?Technology of Carbon and Graphite Fiber Composites?, (Van Nostrand Reinhold, New York, 1981) ch. 6.
3. N. Watanabe,Solid State Ionics 1 (1980) 87.
4. Private communication with Dr K. Johnson from Medronic Blood System Inc., Minneapolis, (1985).
5. B. Chapman, (ed.), ?Glow Discharge Processes? (Wiley, New York, 1980).