R. S.  Kusurkar, Alkobati, N. A. H., Gokule, A. S., and Puranik, V. G., ?Use of the pictet-spengler reaction for the synthesis of 1,4-disubstituted-1,2,3,4-tetrahydro-beta-carbolines and 1,4-disubstituted-beta-carbolines: formation of gamma-carbolines?, Tetrahedron, vol. 64, no. 8, pp. 1654-1662, 2008.

P. M.  Chaudhary, Chavan, S. R., Shirazi, F., Razdan, M., Nimkar, P., Maybhate, S. P., Likhite, A. P., Gonnade, R. G., Hazra, B. G., Deshpande, M. V., and Deshpande, S. R., ?Exploration of click reaction for the synthesis of modified nucleosides as chitin synthase inhibitors?, Bioorganic & Medicinal Chemistry, vol. 17, no. 6, pp. 2433-2440, 2009.