K. Younis, S. 2011. The Use of 3-Benzylidene Phthalide as Precursor to Synthesize New 1,3,4-Oxadiazole Derivatives. Rafidain Journal of Science. 22, 5 (Jul. 2011), 62–75. DOI:https://doi.org/10.33899/rjs.2011.6507.