1. Basheer P. A. M. Montgomery F. R. and Long A. E. (1993). “The `autoclam permeability system' for measuring the in-situ permeation properties of concrete.” Conf. Proc. of British Inst. of Non-Destructive Testing British Inst. for Non-Destructive Testing Northampton U.K. 235–259.
2. British Standards Institute. (1970). “Methods of testing hardened concrete for other than strength.” BS 1881: Part 5 London U.K.
3. Bungey J. H. (1989). The testing of concrete in structures . Surrey University Press London U.K. 137–161.
4. Claisse P. A. (1988). “Properties and performance of high strength silica fume concrete ” PhD thesis Univ. of Leeds U.K.
5. Concrete Society. (1984). “Development in testing concrete for durability.” Proc. One-Day Symp. London U.K. 59–64.