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Phys Rev B Condens Matter
; 49(18): 13275-13278, 1994 May 01.
Article
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| MEDLINE
| ID: mdl-10010258
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Phys Rev B Condens Matter
; 48(6): 4168-4171, 1993 Aug 01.
Article
in English
| MEDLINE
| ID: mdl-10008877