@Article{acp-10-8629-2010,
AUTHOR = {Chan, E. and Vet, R. J.},
TITLE = {Baseline levels and trends of ground level ozone in Canada and the United States},
JOURNAL = {Atmospheric Chemistry and Physics},
VOLUME = {10},
YEAR = {2010},
NUMBER = {18},
PAGES = {8629--8647},
URL = {http://www.atmos-chem-phys.net/10/8629/2010/},
DOI = {10.5194/acp-10-8629-2010}
}