Sheikhshoaie, Iran, et al. “Experimental and Theoretical Study of Two Salen Type Schiff Base Compounds As Corrosion Inhibitors on Mild Steel in 0.5 M H2SO4 Media”. Asian Journal of Chemistry, vol. 18, no. 3, Mar. 2010, pp. 1903-1, https://asianpubs.org/index.php/ajchem/article/view/20895.