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Phys Rev B Condens Matter
; 44(2): 878-881, 1991 Jul 01.
Article
in English
| MEDLINE
| ID: mdl-9999203
2.
Phys Rev B Condens Matter
; 41(16): 11623-11626, 1990 Jun 01.
Article
in English
| MEDLINE
| ID: mdl-9993596