Ali Hullio, Ahmed, and A.Q. Panhwar. 2017. “Ionic Liquid Based Vilsmeier Reagent As Dehydrating Reagent for Generation of Ketenes and Their in Situ Cycloaddition Reactions”. Asian Journal of Organic & Medicinal Chemistry 2 (4):182-86. https://doi.org/10.14233/ajomc.2017.AJOMC-P90.