“Derivative Zero - Crossing Spectrophotometry Of Binary Mixtures Of Acetyl Acetonates Of Micro – Amounts Of Mn (Ii) And Al (Iii)”. Baghdad Science Journal, vol. 10, no. 3, Sept. 2013, pp. 866-82, https://doi.org/10.21123/bsj.2013.10.3.866-882.