G. C. Wadhawa , Nitin A. Mirgane , Dinanath D Patil, Vitthal S.Shivankar. “Red Mud Catalyzed Synthesis of Benzimidazole, Benzothiazoles and Quinoxalines”. International Journal of Advanced Science and Technology, Vol. 29, no. 9s, May 2020, pp. 5286 -97, https://sersc.org/journals/index.php/IJAST/article/view/17847.