1. Aggarival, R.K. 1977, Carbon 15: 291.
2. Ashton, J.E., Halpin J.C. and Petit, F.H. 1969. Primer on Composite Materials: Analysis, Westport, Conn.: Technomic Publishing Co.
3. Bacon, R. 1973. Chemistry and Physics of Carbon 9: 2. New York: Marcel Dekker, Inc.
4. Bathia, G., Fitzer, E. and Kompalik, D. 1984. International Carbon Conference, Bordeaux, France, Paris: Group Francais d’etude des carbon.
5. Boncher, E.A., Cooper, R.N. and Everett, D.H. 1970, Carbon 8: 597.