Iqbal, M. N., و A. Ashraf. "Acid-Tolerant Bacteria from Plant Soils: Potential Role in Plant Growth Promotion". International Journal of Molecular Microbiology, م 4, عدد 2, أغسطس، 2021, ص 35-37, https://psmjournals.org/index.php/ijmm/article/view/693.