Afolabi, O. et al. 2016. Acetylcholinesterase activity and oxidative stress indices in cerebellum, cortex and hippocampus of rats exposed to lead and manganese. International Journal of Biological Research. 4, 2 (Aug. 2016), 157–164. DOI:https://doi.org/10.14419/ijbr.v4i2.6459.