Emmanuel, Oche Abigel, et al. “Energy Audit in BUA Cement Plant Okpella Edo State Using ETAP and MATLAB Software for Improved Performance”. Direct Research Journal of Engineering and Information Technology, vol. 12, no. 2, Aug. 2024, pp. 137-44, https://journals.directresearchpublisher.org/index.php/drjeit/article/view/331.