K. Shakya, Ashok, and Zaha El-Agbar. “Synthesis and Biological Evaluation of Schiff Bases of 2-Amino-5-(2-Chlorophenyl)-1,3,4-Oxadiazole”. Asian Journal of Chemistry, vol. 20, no. 4, Mar. 2010, pp. 2515-20, https://asianpubs.org/index.php/ajchem/article/view/12646.