@Article{acp-11-767-2011,
AUTHOR = {Hirsikko, A. and Nieminen, T. and Gagn\'e, S. and Lehtipalo, K. and Manninen, H. E. and Ehn, M. and H\~orrak, U. and Kerminen, V.-M. and Laakso, L. and McMurry, P. H. and Mirme, A. and Mirme, S. and Pet\"aj\"a, T. and Tammet, H. and Vakkari, V. and Vana, M. and Kulmala, M.},
TITLE = {Atmospheric ions and nucleation: a review of observations},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {11},
YEAR = {2011},
NUMBER = {2},
PAGES = {767--798},
URL = {http://www.atmos-chem-phys.net/11/767/2011/},
DOI = {10.5194/acp-11-767-2011}
}