1. A.A.Konkin and N.F.Konnova, Zhurn.VKhO im.D.I.Mendeleeva, No.6, 632 (1972).
2. Yamada, Kagaku Soti, 5, No.12, 61 (1963).
3. G.Jougnet and R.Schile, International Conference on Carbon Fibres, their Composites and Applications, Paper No.16, London (1971) (henceforth abbreviated to Conference Paper No...)
4. USA Patent 3369920 (1968).
5. N.C.W.Judd, Conference Paper No.32.