F. Javeed, M. G. Shahid, and A. Javed, “Effect of Different Operational Parameters on Bio-degradation of Chicken Feathers by Aspergillus niger: Investigation Under Submerged Fermentation Process: Parameters on Bio-degradation of Chicken Feathers”, Pakistan Journal of Scientific & Industrial Research, vol. 63, no. 2, pp. 71–76, Jul. 2020.