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Phys Rev B Condens Matter
; 41(5): 2855-2860, 1990 Feb 15.
Article
in English
| MEDLINE
| ID: mdl-9994051
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Phys Rev B Condens Matter
; 38(5): 3269-3275, 1988 Aug 15.
Article
in English
| MEDLINE
| ID: mdl-9946665