Kaskaoutis D.G., Kambezidis H.D., Jacovides C.P. and Steven M.D.: Erratum to “Checking the validity of the angstrom’s formula with spectral data of direct-beam irradiance obtained in Athens, Greece, Atmospheric Research Vol 80(2-3) p.237 Doi: 10.1016/j.atmosres.2006.02.028, 2006