Range: ±4.0×10^-15 10^-8 W/(m^2×K^4)
||David R. Lide. CRC Handbook of Chemistry and Physics, 84th Edition. CRC Press 2003.
||the constant of proportionality in the Stefan–Boltzmann law: the total energy radiated per unit surface area of a black body in unit time is proportional to the fourth power of the thermodynamic temperature. Symbol is s. Units W=Watt (power),K=degree Kelvin (absolute temperature)