TY - GEN TY - GEN T1 - Stable sulphate clusters as a source of new atmospheric particles JF - Universitas Helsingiensis : a quarterly VO - 19 IS - 2 SP - 7 OP - 39 A1 - Kulmala, Markku A2 - Pirjola, Liisa A2 - Mäkelä, Jyrki M. LA - eng YR - 2000 UL - https://kansalliskirjasto.finna.fi/Record/arto.012558145 ER -