Abebe, A., I. J. Villar-Garcia, and Y. Chebude. “Investigation of 1, 10-Phenanthroline Based Ionic Liquids Using X-Ray Photoelectron Spectroscopy”. Ethiopian Journal of Science and Technology, Vol. 9, no. 1, Jan. 2025, pp. 31-44, http://journals.bdu.edu.et/index.php/EJST/article/view/2033.