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- [9] SHIELDING OF CRYSTAL FIELDS AT RARE-EARTH IONS BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1968, 13 (01): : 81 - &
- [10] EFFECT OF PRESSURE ON THE CRYSTAL-FIELD SPLITTING IN RARE-EARTH PNICTIDES AND CHALCOGENIDES JOURNAL DE PHYSIQUE, 1979, 40 : 124 - 125