@Article{acp-11-4645-2011,
AUTHOR = {Salmi, S.-M. and Verronen, P. T. and Th\"olix, L. and Kyr\"ol\"a, E. and Backman, L. and Karpechko, A. Yu. and Sepp\"al\"a, A.},
TITLE = {Mesosphere-to-stratosphere descent of odd nitrogen in February–March 2009 after sudden stratospheric warming},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {11},
YEAR = {2011},
NUMBER = {10},
PAGES = {4645--4655},
URL = {http://www.atmos-chem-phys.net/11/4645/2011/},
DOI = {10.5194/acp-11-4645-2011}
}