1. Carneiro FLLB (1943) A new method to determine the tensile strength of concrete. In: Proceedings of the 5th meeting of the Brazilian association for technical rules, 16 September 1943, (in Portuguese) 3d Section, pp 126–129.
2. Akazawa T (1943) New test method for evaluating internal stress due to compression of concrete (the splitting tension test) (part 1). J Jpn Soc Civ Eng 29:777–787
3. Hobbs DW (1964) The tensile strength of rocks. Int J Rock Mech Min Sci 1:385–396
4. Hobbs DW (1965) An assessment of a technique for determining the tensile strength of rock. Br J Appl Phys 16:259–268
5. Ripperger E, Davis N (1947) Critical stresses in a circular ring (paper no 2308). Trans Am Soc Civ Eng 112:619–627