1. Galety I (2003) Tobacco: a cultural history on how an exotic plant seduced civilization. Grove Press, USA
2. World Health Organization (1997) Tobacco or Health: A Global Status Report, Geneva
3. Gan WE, Shi WW, Su OD (2004) Atomic Spectr 25:245–250
4. Barlas H, Ubay G, Soyhan B, Bayat C (2001) Fresenius Environ Bull 10:80–83
5. Garg AN, Singh V, Chutke NL, Ambulkar MN (1995) J Radioanal Nucl Chem 195:161–172