1. Electron Paramagnetic Resonance of Transition Ions;Abragam,1970
2. Electron Paramagnetic Resonance in Compounds of Transition Elements;Al'tshuler,1974
3. The application of tensor operators in the analysis of EPR and ENDOR spectra;Buckmaster;Phys. Status Solidi A,1972
4. Angular momentum operator equivalents;Marshall;Magn. Reson. Rev.,1988
5. Theory of complex spectra;Racah;Phys. Rev.,1942