%0 Journal Article %A Ilias Fountoulakis %A Christos S. Zerefos %A Alkiviadis F. Bais %A John Kapsomenakis %A Maria-Elissavet Koukouli %A Nozomu Ohkawara %A Vitali Fioletov %A Hugo De Backer %A Kaisa Lakkala %A Tomi Karppinen %A Ann R. Webb %T Twenty-five years of spectral UV-B measurements over Canada, Europe and Japan: Trends and effects from changes in ozone, aerosols, clouds, and surface reflectivity %J Comptes Rendus. GĂ©oscience %D 2018 %P 393-402 %V 350 %N 7 %I Elsevier %R 10.1016/j.crte.2018.07.011 %G en %F CRGEOS_2018__350_7_393_0