S. Nazimunnisa, V. Veeranna, V. V. Laxmi, G. P. Prasad, and S. Yallappa, “First-Order Derivative Spectrophotometry Method with Triapine as Chelating Agent for Simultaneous Determination of Barium(II) and Lead(II)”, ajc, vol. 35, no. 5, pp. 1231–1236, Apr. 2023.