A. R.  Gholap, Chakor, N. S., Daniel, T., Lahoti, R. J., and Srinivasan, K. V., ?Remarkably rapid regioselective synthesis of beta-enaminones using silica chloride in a heterogeneous as well as an ionic liquid in a homogeneous medium at room temperature?, Journal of Molecular Catalysis A-Chemical, vol. 245, no. 1-2, pp. 37-46, 2006.