1. S. A. Dikanov and Y. D. Tsvetkov, Electron Spin Echo Envelope Modulation Spectroscopy (CRC Press, Boca Raton, FL, 1992).
2. A. Schweiger, Angew. Chem. Int. Ed. Engl. 30, 265–292 (1991).
3. L. Kevan, in Modern Pulsed and Continuous Wave Electron Spin Resonance, edited by L. Kevan and M. K. Bowman (Wiley-Interscience, New York, 1990), Ch. 231.
4. W. B. Mims and J. Peisach, in Advanced EPR, edited by A. Hoff (Elsevier, Amsterdam, 1989), Ch. 1;
5. S. A. Dikanov and A. V. Ashtashbin, ibid., Ch. 2.