Ahmed, A., S. Saeed, and A. Jumaa. “Preparation of a Number of 1, 3, -4 Oxadiazole Compounds Derived from -2 Hydroxide Lipidine”. Journal of Education and Science (JES), vol. 18, no. 1, Jan. 2006, pp. 1-10, doi:10.33899/edusj.2006.79217.