A. O. Abdelhamid, A. A. Fahmi, and K. N. M. Halim, “Reactions with hydrazonoyl halides 65: Synthesis of some new 1,3,4-thiadiazoles and triazolino[4,3-a]pyrimidines containing pyrazole moiety”, Eur. J. Chem., vol. 2, no. 3, pp. 317–323, Sep. 2011.