1. Ademoroti, C. (1996). Environmental chemistry and toxicology. Ibadan: Foludex Press Ltd.
2. Agbaire, P., & Esiefarienrhe, E. (2009). Air Pollution tolerance indices (apti) of some plants around Otorogun Gas Plant in Delta State, Nigeria. Journal of Applied Sciences and Environmental Management, 13, 11–14.
3. Agrawal, S., & Tiwari, S. (1997). Susceptibility level of few plants on basis of air pollution tolerance index. Indian Forester, 123, 319–322.
4. Ashraf, M. A., Khan, A. M., Ahmad, M., Aqib, S., Balkhair, K. S., & Bakar, N. K. A. (2014). Release, deposition and elimination of radiocesium (137Cs) in the terrestrial environment. Environmental Geochemistry and Health. doi: 10.1007/s10653-014-9620-9
5. Babu, G. B., Parveen, S. N., Kumar, K. N., & Reddy, M. S. (2013). Evaluation of Air Pollution Tolerance Indices of Plant Species Growing in the Vicinity of Cement Industry and Yogi Vemana University Campus. Indian Journal of Advances in Chemical Science, 2, 16–20.