. . "\\(\\rho = \\frac{dQ}{dV}\\), where \\(Q\\) is electric charge and \\(V\\) is Volume."^^ . . "http://en.wikipedia.org/wiki/Charge_density"^^ . "http://www.maxwells-equations.com/pho/charge-density.php"^^ . . . "\\(\\rho\\)"^^ . "Electric Charge Density"@en . "\\(charge-density\\)"^^ . "http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=31891"^^ . . . "In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively." .