R. HEKMATSHOAR, S. JAVANSHIR, H. A. OSKOOIEE, and M. M. HERAVI, “Zeofen as a Catalyst for Cleavage of Semicarbazones and Phenyl Hydrazones Under Conventional Heating and Microwave Irradiation”, ajc, vol. 21, no. 5, pp. 3343–3346, Mar. 2010.