Ibrahim, Mohammad Mahmoud. “Synthesis and Characterization of New 3,5-Disubstituted-4,5-Dihydro-1H-Pyrazole and Their Carbothioamide Derivatives”. European Journal of Chemistry, vol. 6, no. 1, Mar. 2015, pp. 78-83, doi:10.5155/eurjchem.6.1.78-83.1148.