Hamdi, Hamida, and Amina Hellal. 2019. “Optimization of Phenol Biodegradation by Immobilized Bacillus Subtilis Isolated from Hydrocarbons-Contaminated Water Using the Factorial Design Methodology”. Journal of the Serbian Chemical Society 84 (7). Belgrade, Serbia:679–688. https://doi.org/10.2298/JSC181204022H.