"http://en.wikipedia.org/wiki/Elastic_modulus"^^ . "The Modulus of Elasticity is the mathematical description of an object or substance's tendency to be deformed elastically (that is, non-permanently) when a force is applied to it." . "Modulus of Elasticity"@en . . . . . . . . . "E" . "\\(E = \\frac{\\sigma}{\\varepsilon}\\), where \\(\\sigma\\) is the normal stress and \\(\\varepsilon\\) is the linear strain."^^ . . . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31889"^^ . . . . .