DURAIRAJ, K., A. SOMAPRABHA, and V. R. ALAGAMMAI. “BIODEGRADATION OF FEATHER WASTE BY EXTRACELLULAR KERATINASE FROM SPORULATING MICROORGANISMS”. UTTAR PRADESH JOURNAL OF ZOOLOGY 42, no. 7 (April 13, 2021): 83-100. Accessed November 29, 2021. http://mbimph.com/index.php/UPJOZ/article/view/2061.