Ahmad, S. A.; Yusoff, I.; Shukor, M. Y. A.; Phang, L. Y.; Syed, M. A. Biodegradation of Chicken Feather Wastes in Submerged Fermentation Containing High Concentrations of Heavy Metals by Bacillus Sp. Khayat. J Environ Bioremed Toxicol 2014, 2, 38-41.