A. El-Rahman S. Ferwanah and A. M. Awadallah, “Synthesis of Novel 4,5-Dihydro-1,2,4,5-oxatriazine-6-one from the Reaction of Benzonitrile Oxide with 1-Ethoxycarbonyl-1-methylhydrazine”, ajc, vol. 10, no. 1, pp. 180–184, Mar. 2010.