Sinan Samir Juma, Hindreen I. Ibrahim,. “Effect of Mineral Fertilization and Humic Acids on Availability of NPK in Soil and Maize Growth”. Annals of the Romanian Society for Cell Biology 25, no. 6 (June 14, 2021): 11414–11418. Accessed April 26, 2024. https://www.annalsofrscb.ro/index.php/journal/article/view/7651.