H. WU, X.-M. CHEN, Y. WAN, H.-Q. XIN, S.-Q. LIAN, and L. YE, “Synthesis of Polyhydroquinolines Hantzsch Reaction Catalyzed by Starch Sulfuric Acid in Water”, ajc, vol. 21, no. 4, pp. 2815–2821, Mar. 2010.