1. Bratenko, M.K., Panimarchuk, O.I., Mel’nichenko, N.V., and Vovk, M.V., Zh. Org. Khim., 2005, vol. 41, p. 247.
2. Bratenko, M.K., Chornous, V.A., and Vovk, M.V., Zh. Org. Khim., 2001, vol. 37, p. 587.
3. Vovk, M.V., Chornous, V.A., Tsymbal, I.F., and Bratenko, M.K., Ukr. Khim. Zh., 2002, vol. 68, p. 59.
4. Bratenko, M.K., Chornous, V.A., and Vovk, M.V., Zh. Org. Khim., 2002, vol. 38, p. 1223.
5. Seela, F. and Zulauf, M., J. Chem. Soc., Perkin Trans. 1, 1999, vol. 4, p. 479.