b"\n_START_ARTICLE_\nEsponente di \xc3\x85ngstr\xc3\xb6m\n_START_SECTION_\nRiferimenti\n_START_PARAGRAPH_\n\xc3\x85ngstr\xc3\xb6m A., 1964. The parameters of atmospheric turbidity. Tellus, 16: 64-75._NEWLINE_Gobbi, G. P., Kaufman, Y. J., Koren, I., and Eck, T. F.: Classification of aerosol properties derived from AERONET direct sun data, Atmos. Chem. Phys., 7, 453-458, 2007._NEWLINE_N. T. O'Neill: Comment on \xe2\x80\x9cClassification of aerosol properties derived from AERONET direct sun data\xe2\x80\x9d by G. P. Gobbi et al. (2007): http://www.atmos-chem-phys-discuss.net/9/175/2009/acpd-9-175-2009.pdf"