Chandra Tiwari, Sushil, and Hemlata Mohabey. “Synthesis, Characterization and Analytical Applications of Copper(II) N-Hydroxyamidines Complex”. Asian Journal of Chemistry, vol. 17, no. 4, June 2016, pp. 2565-70, https://asianpubs.org/index.php/ajchem/article/view/13975.