Mamun, M.A.A. et al. 2015. Characterization of an alkaline protease with high quality bating potential in leather processing from Bacillus licheniformis MZK05M9 mutant. International Journal of Biological Research. 3, 1 (Mar. 2015), 36–41. DOI:https://doi.org/10.14419/ijbr.v3i1.4250.