1. ACI Committee 318 “Building Code Requirements for Reinforced Concrete (ACI 318‐83) ” American Concrete Institute Detroit Mich. 1983.
2. Elvery R. H. and Din N. M. “Ultrasonic Inspection of Reinforced Concrete Flexural Members ” Symposium on Non‐Destructive Testing of Concrete and Timber Institution of Civil Engineers London England 1970 pp. 51–58.
3. The effect of stress, frequency, curing, mix and age upon the damping of concrete
4. Pellerin R. F. “Non‐Destructive Testing of Timber at Washington State University ” Symposium on Non‐Destructive Testing of Concrete and Timber Institution of Civil Engineers London England 1970 pp. 85–90.
5. Shibani M. M. “Dynamic Stiffness Rigidity of Reinforced Concrete Beams ” thesis presented to Washington State University at Pullman Wash. in 1983 in partial fulfillment of the requirements for the degree of Master of Science.