Rai, H.C., Ashwini Kumar, K.B. Singh, and Raman Kumar. “Spectrophotometric Determination of Nickel(II) With Phenanthrenequinone Monosemicarbazone”. Asian Journal of Chemistry 16, no. 1 (July 20, 2012): 299–303. Accessed July 22, 2024. https://asianpubs.org/index.php/ajchem/article/view/19625.