1. Abdel-Fattah AM, El-Gamal MS, Ismail SA et al (2018) Biodegradation of feather waste by keratinase produced from newly isolated Bacillus licheniformis ALW1. J Genet Eng Biotechnol 16:311–318
2. Abirami S, Ragavi R, Antony VS (2020) Utilization of keratinolytic Lichtheimia corymbifera AS1 for degradation of cattle hoove: a slaughter house waste to use in plant growth. Biointerface Res Appl Chem 10:6417–6426
3. Adetunji CO, Makanjuola OR, Arowora KA et al (2012) Production and application of keratin-based organic fertilizer from microbially hydrolyzed feathers to cowpea (Vigna unguiculata). Int J Sci Eng Res 3:22–29
4. Aina A, Ezeamagu CO, Akindele ST (2021) Purification of Wickerhamomyces anomalus keratinase and its prospective application in poultry feed industries. Fountain J Nat Appl Sci 1:1–16
5. Ali TH, Ali NH, Mohamed LA (2011) Production, purification and some properties of extracellular keratinase from feathers-degradation by Aspergillus oryzae NRRL-447. J Appl Sci Environ Sanitat 6:123–136