Scientific journal publication Determining the index of refraction of polar stratospheric clouds above Andoya (69 degrees N) by combining size-resolved concentration and optical scattering measurements. Deshler, T.; Nardi, B.; Adriani, A.; Cairo, F.; Hansen, G.; Fierli, F.; Hauchecorne, A.; Pulvirenti, L. Publication details Journal: J. Geophys. Res., 105, 3943–3953, 2000 DOI: 10.1029/1999JD900469