H. M. Basheer, F. Jasim, and M. A. A.-. Hammed, “Derivative Zero - Crossing Spectrophotometry Of Binary Mixtures Of Acetyl Acetonates Of Micro – Amounts Of Mn (Ii) And Al (Iii)”., Baghdad Sci.J, vol. 10, no. 3, pp. 866–882, Sep. 2013.