1. Symons, M.C.R., Chem. Soc. Rev., 1984, no. 4, p. 313.
2. Radical Ionic Systems. Properties in Condensed Phases, Lund, A. and Shiotani, M., Eds., Dordrecht: Kluwer, 1991.
3. Feldman, V.I., Acta Chem. Scand., 1997, vol. 51, no.2, p. 181.
4. Fangstrom, T., Lunell, S., Engels, B., Ericsson, L.A., Shiotani, M., and Komaguchi, K., J. Chem. Phys., 1997, vol. 107, no.2, p. 297.
5. Belevskii, V.N., Belopushkin, S.I., Tyurin, D.A., and Chuvylkin, N.D., Khim. Vys. Energ., 1999, vol. 33, no.2, p. 104 [High Energy Chem., 1999, vol. 33, no. 2, p. 77].