Theeb, Batool Omran Theeb, et al. “Cytotoxic Effect of Gliotoxin, Hemolysin, Protease and Melanin Purified from Aspergillus Fumigates on REF Cell Line, in Vitro Study”. Journal of Biotechnology Research Center, vol. 9, no. 2, June 2015, pp. 4-10, doi:10.24126/jobrc.2015.9.2.419.