1. Electron paramagnetic resonance of transition ions;Abragam,1970
2. Transition ion electron paramagnetic resonance;Pilbrow,1990
3. Electron-spin transient nutation: a new approach to simplify the interpretation of ESR spectra
4. S. Stoll, G. Jeschke and A. Schweiger, to be published.
5. Angular momentun in quantum mechanics;Edmonds,1957