TY - JOUR A1 - Sogacheva, L. A1 - Hamed, A. A1 - Facchini, M. C. A1 - Kulmala, M. A1 - Laaksonen, A. T1 - Relation of air mass history to nucleation events in Po Valley, Italy, using back trajectories analysis JO - Atmos. Chem. Phys. J1 - ACP VL - 7 IS - 3 SP - 839 EP - 853 Y1 - 2007/02/15 PB - Copernicus Publications SN - 1680-7316 UR - http://www.atmos-chem-phys.net/7/839/2007/ L1 - http://www.atmos-chem-phys.net/7/839/2007/acp-7-839-2007.pdf ER -