@Article{acpd-11-15875-2011,
AUTHOR = {Gagn\'e, S. and Lepp\"a, J. and Pet\"aj\"a, T. and McGrath, M. J. and Vana, M. and Kerminen, V.-M. and Laakso, L. and Kulmala, M.},
TITLE = {Measurements of aerosol charging states in Helsinki, Finland},
JOURNAL = {Atmospheric Chemistry and Physics Discussions},
VOLUME = {11},
YEAR = {2011},
NUMBER = {5},
PAGES = {15875--15920},
URL = {http://www.atmos-chem-phys-discuss.net/11/15875/2011/},
DOI = {10.5194/acpd-11-15875-2011}
}