Muhammad, N. A., khalid D. Khalid, and D. K. A. Modu. “Corrosion Inhibition of Methanol Extract of Parkia Biglobosa Pulp on Carbon Steel in Acidic Medium”. International Journal of Emerging Trends in Science and Technology, Vol. 2, no. 07, July 2015, http://igmpublication.org/ijetst.in/index.php/ijetst/article/view/793.