El-Hamid, H. T. A., A. E. Al-Prol, and M. A. Hafiz. “Plackett-Burman and Response Surface Methodology for Optimization of Oily Wastewater Bioremediation by Aspergillus Sp.”. South Asian Journal of Research in Microbiology, Vol. 2, no. 1, Oct. 2018, pp. 1-9, doi:10.9734/sajrm/2018/v2i129242.