G, Swaroop, et al. “A Comparative Study on Extraction, Purification and Characterization of Amylase Enzyme from Aspergillus Niger and Aspergillus Awamori”. International Journal of Biological Research, vol. 1, no. 2, Sept. 2013, pp. 23-28, https://doi.org/10.14419/ijbr.v1i2.1282.