Ali Hullio, Ahmed, and A.Q. Panhwar. “Ionic Liquid Based Vilsmeier Reagent As Dehydrating Reagent for Generation of Ketenes and Their in Situ Cycloaddition Reactions”. Asian Journal of Organic & Medicinal Chemistry, vol. 2, no. 4, Dec. 2017, pp. 182-6, doi:10.14233/ajomc.2017.AJOMC-P90.