. . . . "http://en.wikipedia.org/wiki/Thermionic_emission"^^ . "http://www.iso.org/iso/catalogue_detail?csnumber=31897"^^ . "A" . "\"Richardson Constant\" is a constant used in developing thermionic emission current density for a metal." . "The thermionic emission current, \\(J\\), for a metal is \\(J = AT^2\\exp{(-\\frac{\\Phi}{kT})}\\), where \\(T\\) is thermodynamic temperature, \\(k\\) is the Boltzmann constant, and \\(\\Phi\\) is a work function."^^ . "Richardson Constant"@en .