1. Martynov, A.V., Ivanov, A.V., Amosova, S.V., and Potapov, V.A., Zh. Org. Khim., 2006, vol. 42, no. 7, p. 1099.
2. Riley, R.F., Flato, J., and Bengels, D., J. Org. Chem., 1962, vol. 27, p. 2651.
3. Hurd, C.D. and Fancher, O., Int. J. Sulf. Chem. A, 1971, vol. 1, p. 18.
4. Potapov, V.A. and Amosova, S.V., Zh. Org. Khim., 2003, vol. 39, no. 10, p. 1449.
5. Potapov, V.A., Amosova, S.V., Belozerova, O.V., Albanov, A.I., Yarosh, O.G., and Voronkov, M.G., Chem. Heterocycl. Comp., 2003, no. 4, p. 633.