1. Azevedo DA, Moreira LS, Siqueira DS (1999) Composition of extractable organic matter in aerosols from urban areas of Rio de Janeiro City. Brazil Atmos Environ 33:4987–5001
2. Central Pollution Control Board (CPCB) (2009) National ambient air quality standards.
http://www.cpcb.nic.in/National_Ambient_Air_Quality_Standards.php
. Accessed 08 Jan 2015
3. Chowdhury Z, Zheng M, Schauer JJ, Sheesley RJ, Salmon L, Cass GR, Russell A (2007) Speciation of ambient fine organic carbon particles and source apportionment of PM2.5 in Indian Cities. J Geophys Res 112:D15303
4. Crutzen PJ, Andreae MO (1990) Biomass burning in the tropics: impact on atmospheric chemistry and biogeochemical cycles. Science 250(4988):1669–1678
5. Fraser MP, Yue ZW, Tropp RJ, Kohl SD, Chow JC (2002) Molecular composition of organic fine particulate matter in Houston, TX. Atmos Environ 36(38):5751–5758