OBUMNEME O., OTARAKU, IPEGHAN J., Okwonna,. Evaluation of Transformer Grade Oil from Coconut Seed Waste. Global Journal of Research In Engineering, [S.l.], feb. 2021. ISSN 2249-4596. Available at: <https://engineeringresearch.org/index.php/GJRE/article/view/2116>. Date accessed: 21 may 2022.