1. Selected Methods for Synthesis and Modification of Heterocycles. Quinoline: Chemistry and Biological Activity [in Russian]; Kartsev, V. G., Ed.; MBFNP: Moscow, 2007, Vol. 6.
2. (a) Yang, B. V. US Patent 6596735. (b) Yang, B. V. US Patent 6258824. (c) Wissner, A.; Tsou, H.-R.; Floyd, M. B., Jr.; Johnson, B. D.; Overbeek-Klumpers, E. G. US Patent 6821988.
3. Yuan, J.; Maynard, G.; Hutchison, A. US Patent 7041664.
4. Farina, C.; Giardina, G. A. M.; Grugni, M.; Raveglia, L. F. EP Patent 0940391.
5. Dyachenko, V. D.; Litvinov, V. P. Chem. Heterocycl. Compd.1997, 33, 1203. [Khim. Geterotsikl. Soedin.1997, 1384.]