@article{Zerefos_2012,
title={Evidence of a possible turning point in solar UV-B over Canada,
Europe and Japan},
volume={12},
ISSN={1680-7324},
url={http://dx.doi.org/10.5194/acp-12-2469-2012},
DOI={10.5194/acp-12-2469-2012},
number={5},
journal={Atmospheric Chemistry and Physics},
publisher={Copernicus GmbH},
author={Zerefos,
C. S. and Tourpali,
K. and Eleftheratos,
K. and Kazadzis,
S. and Meleti,
C. and Feister,
U. and Koskela,
T. and Heikkilä,
A.},
year={2012},
month=mar,
pages={2469–2477} }