S.  B. Kumar, Gadakh, S., and Sudalai, A., ?"Metal-free'' synthesis of 1,2,3-triazoles via tandem azidation, intramolecular [3+2]-cycloaddition and aromatization of ethyl acrylate derivatives?, Tetrahedron Letters, vol. 59, no. 24, pp. 2365-2367, 2018.