Mohan, R. Divya, and Anu Jose. “Reactions of Huisgen Zwitterions With Diphenyl Cyclopropenone: A Novel Strategy for the Synthesis of Oxazinone Derivatives”. Asian Journal of Chemistry, vol. 30, no. 5, Mar. 2018, pp. 1075-7, doi:10.14233/ajchem.2018.21184.