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Phys Rev B Condens Matter
; 44(16): 8880-8885, 1991 Oct 15.
Article
in English
| MEDLINE
| ID: mdl-9998847
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Phys Rev B Condens Matter
; 41(5): 3048-3052, 1990 Feb 15.
Article
in English
| MEDLINE
| ID: mdl-9994075