A. Sheat, M., محمد, O. I. Mohammed, and O. 2012. “Synthesis of 1,3,4-Oxadiazole Derivatives from Ethyl-2-Piperidone-3-Carboxylate”. Journal of Education and Science (JES) 25 (1):19-25. https://doi.org/10.33899/edusj.2012.58997.