Dakmouche, M., et al. “Enhancement of the Inhibitor Efficiency of 4-Phenyl-1,2-Dithiol-3-Thione on Corrosion of Mild Steel for 20 % Sulphuric Acid”. Asian Journal of Chemistry, vol. 24, no. 11, June 2012, pp. 4887-91, https://asianpubs.org/index.php/ajchem/article/view/9787.