1. A. J. Majumdar and J. F. Ryder, J. Soc. Glass Technol. 9 (1968) 78.
2. F. J. Grimer and M. A. Ali, Building Research Station EN 37/68 (to be published in Magazine of Concrete Research).
3. H. Krenchel, ?Fibre Reinforcement? (Akadamisk Forlag, Copenhagen, 1964).
4. A. Kelly, ?Fibre Reinforcement of Metals? (Her Majesty's Stationery Office publication 1965).
5. A. Kelly, ?Strong Solids? (Clarendon Press, Oxford, 1966).