Omotosho, O. A., and O. O. Ajayi. “Investigating the Acid Failure of Aluminium Alloy in 2 M Hydrochloric Acid Using Vernonia Amygdalina”. Journal of Engineering and Technological Sciences, vol. 44, no. 1, Sept. 2013, pp. 77-92, doi:10.5614/itbj.eng.sci.2012.44.1.6.