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Phys Rev B Condens Matter
; 42(13): 8756-8759, 1990 Nov 01.
Article
in English
| MEDLINE
| ID: mdl-9995082
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Phys Rev B Condens Matter
; 39(4): 2928-2931, 1989 Feb 01.
Article
in English
| MEDLINE
| ID: mdl-9948581