1) J.B. Donnet, a) Carbon 20, 267-282 (1982); b) Carbon 6, 161-176 (1968)
2) H.P. Boehm, E. Diehl, W. Heck, R. Sappok, Angew. Chem. 3, 669-677 (1964)
3) C. Sellitti, J.L. Koenig, H. Ishida, Proceeding of the Second International Conference on Composite Interface (ICCI-II), p.163-177 (1988), Cleaveland, Ohio, USA
4) A. Ishitani, Carbon 19, 269-275 (1981)
5) T. Takahagi, A. Ishitani, Carbon 22, 43-46 (1984)