Ranjan Panday, Amit, et al. “CuI/TMEDA/Catalyzed/Solvent/Free/Homo-Coupling/Reaction/of/Terminal/Alkynes/towards/the/Synthesis/of/Buta-1,3-Diynes”. Asian Journal of Chemistry, vol. 34, no. 3, Feb. 2022, pp. 745-8, doi:10.14233/ajchem.2022.23655.