Goutail F., Pommereau J.P., Phillips C., Deniel C., Sarkissian A., Lefevre F., Kyro E., Rummukainen M., Ericksen P., Andsersen S.B.,et al. (1999). Depletion of column ozone in the Arctic during the winters of 1993-94 and 1994-95. Journal of atmospheric chemistry, 32.