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Phys Rev B Condens Matter
; 46(20): 13592-13595, 1992 Nov 15.
Article
in English
| MEDLINE
| ID: mdl-10003408
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Phys Rev B Condens Matter
; 44(19): 10980-10982, 1991 Nov 15.
Article
in English
| MEDLINE
| ID: mdl-9999141