1. http://www.asce.org/les/pdf/reportcard/2005_Report_Card-Full_Report.pdf
2. “Application of Residual Stress Techniques in the Determination of In-situ Load in Reinforced Bars,”;Owens;Experimental Techniques,1988
3. Mehrkar-Asl , S. “Concrete Stress-relief Coring: Theory and Application,” Proceedings of FIP Symposium on Post-tensioned Concrete Structures 569 576 1996
4. Ryall , M.J. “The Measurement of In-situ Stresses in Concrete Bridge Decks Using an Instrumented Hard Inclusion Technique,” Proceedings of the Centenary Year Conference on Bridge Assessment, Management and Design, 417 422 1994
5. “Structural Testing of 27 Year Old Prestressed Concrete Bridge Beams,”;Shenoy;PCI Journal,1991