1. 1) Hamill, W. H., Ionic Processes in γ-irradiated organic solids at −196°, Kaiser, E. T. Kevan, L, (eds.), Radical Ions, pp. 321–416, John Wiley & Sons, New York (1968)
2. 2) Shida, T., Electronic Absorption Spectra of Radical Ions, Elsevier, Amsterdam (1988)
3. 3) Lund, A. and Shiotani, M., (eds.), Radical Ionic Systems, Kluwer Academic Publishers, Dordrecht (1990)
4. 4) Tabata, Y., Ito, Y. and Tagawa, S., (eds.), CRC Handbook of Radiation Chemistry, CRC Press, Boca Raton (1991)
5. 6) Lund, A. and Shiotani, M., (eds.), Applications of EPR in Radiation Research, Springer, Cham (2014)