@Article{acpd-9-13523-2009,
AUTHOR = {K\"oppe, M. and Hermann, M. and Brenninkmeijer, C. A. M. and Heintzenberg, J. and Schlager, H. and Schuck, T. and Slemr, F. and Sprung, D. and van Velthoven, P. F. J. and Wiedensohler, A. and Zahn, A. and Ziereis, H.},
TITLE = {Origin of aerosol particles in the mid latitude and subtropical upper troposphere and lowermost stratosphere from cluster analysis of CARIBIC data},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {9},
YEAR = {2009},
NUMBER = {3},
PAGES = {13523--13567},
URL = {http://www.atmos-chem-phys-discuss.net/9/13523/2009/},
DOI = {10.5194/acpd-9-13523-2009}
}