Obaid, Hind Hussein, et al. “Study the Toxic Effect of Non-Bound Colicins Extracted from Escherichia Coil on Transplanted Murine Adenocarcinoma (AM3)”. Journal of Biotechnology Research Center, vol. 3, no. 2, June 2009, pp. 53-62, doi:10.24126/jobrc.2009.3.2.69.