Iliya, Ezekiel. “Multi Doped Hydroxyapatite-Urea Nano Fertilizer: Synthesis and Controlled Micronutrient Release”. Direct Research Journal of Engineering and Information Technology 14, no. 1 (January 14, 2026): 1–11. Accessed April 16, 2026. https://journals.directresearchpublisher.org/index.php/drjeit/article/view/596.