1. Lin, T.Y. and Burns, N.H., ‘Design of prestressed concrete structures’ (John Wiley and Sons, 1981).
2. Dumas, F., ‘Communication sur le relaxation des aciers de précontrainte’,Béton Précontraint 255–256 (March–April 1969) 594–607.
3. Van't Spijker, E., ‘The influence of prestretching on the relaxation properties of cold drawn wire for prestressed concrete’,Cement (January 1967).
4. Gifford, F.W., ‘Creep tests on prestressing steel’,Magazine of Concrete Research,15 (14) (1953).
5. Kajfasz, S., ‘Some relaxation tests on prestressing wire’,Magazine of Concrete Research 10 (39) (1958).