O A., Ezechukwu. “INSTABILITY PROBLEM OF CONVENTIONAL TRANSFORMER DIFFERENTIAL PROTECTION-APPLICATION OF ZERO SEQUENCE CURRENT TRAP”. INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 10, no. 4 (August 5, 2013): 1563–1568. Accessed May 2, 2024. https://rajpub.com/index.php/ijct/article/view/3257.