1. Abragam, A., and Bleaney, B., 1970, Electron Paramagnetic Resonance of Transition Ions, Clarendon Press, Oxford, pp. 541–583.
2. Allen, J. P., Feher, G., Yeates, T. O., Komiya, H., and Rees, D. C., 1987a, Proc. Natl. Acad. Sci. USA 84:5730.
3. Allen, J. P., Feher, G., Yeates, T. O., Komiya, H., and Rees, D. C., 1987b, Proc. Natl. Acad. Sci. USA 84:6162.
4. Allen, J. P., Feher, G., Yeates, T. O., Komiya, H., and Rees, D. C., 1988, Proc. Natl. Acad. Sci. USA 85:8487.
5. Allgeier, J., Disselhorst, J. A. J. M., Weber, R. T., Wenckebach, W. Th., and Schmidt, J., 1990, High-frequency pulsed electron spin resonance, in Modern Pulsed and Continuous-Wave Electron Spin Resonance (L. Kevan and M. K. Bowman, eds.), Wiley, New York, pp. 267–283.