Saaid, F. H., S. J. Dawood, and B. H. Marbeen. “Synthesis and Characterization of 1,3,4- Oxadiazole Derivatives Using an Ultrasonic Technique”. Al-Mustansiriyah Journal of Science, vol. 29, no. 2, Nov. 2018, pp. 101-5, doi:10.23851/mjs.v29i2.183.