Shahzad, S.A. et al. 2012. Microwave-assisted solvent free efficient synthesis of 1,3,4-oxadiazole-2(3H)-thiones and their potent in vitro urease inhibition activity. European Journal of Chemistry. 3, 2 (Jun. 2012), 143–146. DOI:https://doi.org/10.5155/eurjchem.3.2.143-146.551.