Kumar, S. “Studies of Biologically Active Heterocycles: Synthesis, Characterization and Antimicrobial Activity of Some 5-Substitutd-2-Amino-1,3,4-Oxadiazoles”. Dhaka University Journal of Pharmaceutical Sciences, vol. 9, no. 1, Apr. 2011, pp. 53-59, doi:10.3329/dujps.v9i1.7434.