Toxic organic air pollutants in the atmosphere of São Paulo and its origins: dioxins, furans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) - Assunção, João Vicente de; Pequero, Cecília Regina; Nóbrega, Raimundo Paiva da; Abrantes, Rui de (Air pollution XIV, 2006)