A. F. Afira Azman, W. N. Azita W Ali, M. Samsudin, M. M. Zaini Makhtar, N. Ibrahim, and R. M. Kasmani, “Effect of pH at Anode and Cathode Chamber on the Performance of Biological Cathodic Protection”, Chemical Engineering Transactions, vol. 63, pp. 421-426, May 2018.