S. Shahid, F. A. Qureshi, A. Adnan, and S.- ur Rehman, “Chemotherapeutic Role of Bis-3-azophenyl-4-hydroxy-6-methyl-pyran-2-one Iron(II) in Chemically Induced Skin Cancer in Albino Rats”, ajc, vol. 23, no. 12, pp. 5315–5318, Sep. 2011.