M . Sarhan, B. “Synthesis and Spectroscopic Studies of Some Metal Complexes of [3-(3-(2-chloroacetyl)thioureido)pyrazine-2-Carboxylic Acid]”. Al-Qadisiyah Journal of Pure Science, Vol. 22, no. 2, Jan. 2018, pp. 10-19, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/567.