Effect of vehicular traffic, remote sources and new particle formation on the activation properties of cloud condensation nuclei in the megacity of São Paulo, Brazil - Souto-Oliveira, Carlos Eduardo; Andrade, Maria de Fátima; Kumar, Prashant; Lopes, Fábio Juliano da Silva; Babinski, Marly; Landulfo, Eduardo (Atmospheric Chemistry and Physics, 2016)