Oke, I. A., L.E. Umoru, K.T. Oladepo, and M.O. Ogedengbe. 2008. “Utilization of Weibull Techniques to Describe Stability Distribution of Carbon Resin Electrodes”. Ife Journal of Technology 17 (1), 35-46. http://ijt.oauife.edu.ng/index.php/ijt/article/view/11.