DEMIRHAN, NEBAHAT, et al. “Synthesis and Characterization of a Ni(II) and Cu(I) Complexes of Schiff Base Derived from Salicylaldehyde”. Asian Journal of Chemistry, vol. 20, no. 3, Mar. 2010, pp. 2367-72, https://asianpubs.org/index.php/ajchem/article/view/19273.