N. U. Udeh, and B. L. James. “Production and Characterization of Paw-Paw Trunk Activated Carbon”. American Scientific Research Journal for Engineering, Technology, and Sciences 87, no. 1 (March 26, 2022): 9–17. Accessed May 19, 2024. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/7280.