MOHAMED, E. A., S. S. IBRAHIM, A. M. A. HALIM, and J. M. MORSY. “?HALO DERIVATIVES OF I, IO-PHENANTHROLINE”. Biological Sciences - PJSIR, vol. 37, no. 5, Apr. 1994, pp. 171-4, https://v2.pjsir.org/index.php/biological-sciences/article/view/2630.