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Phys Rev B Condens Matter
; 39(15): 10580-10583, 1989 May 15.
Article
in English
| MEDLINE
| ID: mdl-9947864
2.
Phys Rev B Condens Matter
; 36(5): 2976-2979, 1987 Aug 15.
Article
in English
| MEDLINE
| ID: mdl-9943204