CHERIYAN, M., & MOHANAN, K. (2010). Synthesis and Characterization of the Complexes of Cobalt(II), Nickel(II), Copper(II) and Zinc(II) with 2-(2-carboxyphenylazo)-1,3-diketones. Asian Journal of Chemistry, 19(4), 2831–2838. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/13386