Nawaz Bhatti, Haq, Fozia Anjum, and Sumera Saeed. “Bioleaching of Rock Phosphate by Aspergillus Niger”. Asian Journal of Chemistry 21, no. 8 (March 30, 2010): 6029–6040. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/12285.