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Phys Rev B Condens Matter
; 53(8): 4845-4849, 1996 Feb 15.
Article
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| MEDLINE
| ID: mdl-9984046
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Phys Rev B Condens Matter
; 51(8): 5038-5042, 1995 Feb 15.
Article
in English
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Phys Rev B Condens Matter
; 47(8): 4790-4793, 1993 Feb 15.
Article
in English
| MEDLINE
| ID: mdl-10006632
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Phys Rev B Condens Matter
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Article
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| MEDLINE
| ID: mdl-10001532