1. “The Disc Test for Brittle Materials”;Shaw;Trans. ASME,1975
2. Carniero, F.L.L.B. and Barcelios, A., “Concrete Tensile Strength” Union of Testing and Research Laboratories for Materials and Structures, No. 13 (March 1958)
3. “The Indirect Tension Test for Concrete”;Mitchell;Materials Research and Standards,1961
4. Wright, P.J.F., “Comments on an Indirect Tensile Test on Concrete Cylinders”, Magazine of Concrete Research, pp 87-96 (July 1955).