References
- Abragam , A. and Bleaney , B. 1970 . ‘Electron Paramagnetic Resonance of Transition Ions' , Oxford : Clarendon Press .
- Lea , K. R. , Leask , M. J. M. and Wolf , W. P. 1962 . J. Phys. Chem. Solids , 23 : 1981
- Lupei , V. , Stoicescu , C. and Ursu , I. 1983 . Bull. Magn. Res. , 5 : 136
- Lupei , V. 1986 . Proc. XXIII Congress Ampere ‘Magnetic Resonance and Related Phenomena' 281 Roma