‘Environmental tobacco smoke and cancer.’ Okona-Mensah, K & Fayokun, R. Elsevier Encyclopaedia of Environmental Science (2011).
![](https://www.ikenwriter.com/wp-content/uploads/2020/02/ETS-and-Cancer-Elsevier-2011.jpg)
‘An approach to investigating the importance of high potency polycyclic aromatic hydrocarbons (PAHs) in the induction of lung cancer by air pollution.’ Okona-Mensah et al (2005). Food & Chemical Toxicology Journal. Volume 43 (7): 1103-16 https://www.sciencedirect.com/science/article/pii/S0278691505000797?via%3Dihub