S.Sivakumar, A.Sahaya Raja, J.Sathiyabama, and V.Prathipa. 2014. “Spectroscopic Methods Used for Analyzing Protective Film Formed by L-Histidine on Carbon Steel”. International Journal of Pharmaceutics and Drug Analysis 2 (7):601-11. https://ijpda.org/index.php/journal/article/view/86.