1. V. Ukrainets, N. Yu. Golik, A. L. Shemchuk, and V. N. Kravchenko, Khim. Geterotsikl. Soedin., 1364 (2011). [Chem. Heterocycl. Compd., 47, 1122 (2011)].
2. Rundshagen, Anästhesiol. Intensivmed. Notfallmed. Schmerzther, 45, 304 (2010).
3. D. Rainsford, W. F. Kean, and G. E. Ehrlich, Curr. Med. Res. Opin., 24, 2967 (2008).
4. G. McCleane, Anesthesiol. Clin., 25, 825 (2007).
5. A. Kleeman and J. Engel, Pharmaceutical Substances. Synthesis, Patents, and Applications, Georg Thieme Verlag, Stuttgart (2001).