1. B. Ranby and J.F. Rabek (1977) ESR Spectroscopy in Polymer Research, Springer-Verlag, New York.
2. D.J. Kosman and R.D. Bereman (1981) In Spectroscopy in Biochemistry, ed. J. Ellis Bell. CRC Press, Boca Raton, FL.
3. H.M. Swartz, J.R. Bolton and D.C. Borg (1972) Biological Applications in Electron Spin Resonance, Wiley-Interscience, New York.
4. J.E. Wertz and J.R. Bolton (1972) Electron Spin Resonance: Elementary Theory and Practical Applications. McGraw Hill, New York.
5. P.L. Nordio (1976) In Spin Labeling: Theory and Applications, ed. L.J. Berliner. Academic Press, New York.