F. G. Hashim, T. A. Salman, S. B. Al-Baghdadi, T. Gaaz, and A. Al-Amiery, “Inhibition Effect of Hydrazine-Derived Coumarin on a Mild Steel Surface in Hydrochloric acid ”, Finnish J. Trib., vol. 37, no. 3–4, pp. 45–53, Dec. 2020.