References
- Nistor , S. V. , Pawlik , Th. and Spaeth , J.-M. 1995 . J. Phys.: Condens. Matter , 7 : 2225
- Pawlik , Th. , Nistor , S. V. and Spaeth , J.-M. 1997 . J. Phys.: Condens. Matter , 9 : 7631
- De Siebenthal , J. M. , Nicolin , D. and Bill , H. 1978 . Chem. Phys. Lett. , 58 : 317
- Nistor , S. V. , Lazar , D. P. , Kass , H. and Schoemaker , D. 1997 . Solid State Comm. , 104 : 521
- Nistor , S. V. and Schoemaker , D. 1998 . Rom. J. Phys. , 43 : 131
- Pilbrow , J. R. 1990 . Transition Ion Electron Paramagnetic Resonance , Oxford : Oxford Science Publ., Clarendon Press .