ILIYA, Ezekiel. Multi doped Hydroxyapatite-Urea Nano fertilizer: Synthesis and Controlled Micronutrient Release. Direct Research Journal of Engineering and Information Technology, [S. l.], v. 14, n. 1, p. 1–11, 2026. DOI: 10.26765/DRJEIT14235180. Disponível em: https://journals.directresearchpublisher.org/index.php/drjeit/article/view/596. Acesso em: 30 jul. 2026.