B. A. Dar, Z. Zaheer, S. Fatema, and M. Farooqui, “Cu(OH)x: Clay Catalyst Promoted Synthesis of 4,5-dihydro-1,2,4-oxadiazole at Room Temperature”, Orbital: Electron. J. Chem., vol. 9, no. 5, pp. 378-381, Dec. 2017.