V.  Rawat, B. Kumar, S., and Sudalai, A., ?Proline catalyzed sequential alpha-aminooxylation or -amination/reductive cyclization of o-nitrohydrocinnamaldehydes: a high yield synthesis of chiral 3-substituted tetrahydroquinolines?, Organic & Biomolecular Chemistry, vol. 11, no. 22, pp. 3608-3611, 2013.