1. Rånby, B., Rabek, J.F.: ESR Spectroscopy in Polymer Research. Berlin, Heidelberg, New York: Springer 1977; this book contains 2, 519 references, up to 1975
2. Swarz, H.M., Bolton, J.R., Borg, D.C.: Biological Applications of Electron Spin Resonance. New York: Wiley 1972
3. McConnell, H.M., Chesnut, D.B.: J. chem. Phys. 28, 107 (1958)
4. Rembaum, A., Moacanin, J., Haak, R.: J. Macromol. Chem. 1, 657 (1966)
5. Ayscough, P.B.: Electron Spin Resonance in Chemistry. London: Methuen 1967