1. Ray A. Cull, “Elastomers”, p.23 (1989)
2. R.C. Tennyson, “Composite materials in space: Results from LDEF satellite” Proceedings of Canadian Space agency(6), Canada, (1990).
3. M. France Rose. “IEEE Tansaction on Electrical Translations” Vol. El-22, p 555 (1987)
4. J.A. Thorne and C.C. Whipple, “11th National Symposium on the effect of space environments on materials” p.243, St.Louis (1967)
5. J. McKeller and N.S. Allen, “Photochemistry of man made Polymers”, Applied Science Publications, London (1979)