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Phys Rev B Condens Matter
; 39(1): 811-814, 1989 Jan 01.
Article
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| MEDLINE
| ID: mdl-9947239
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Phys Rev B Condens Matter
; 36(7): 3739-3744, 1987 Sep 01.
Article
in English
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Phys Rev B Condens Matter
; 32(5): 3107-3111, 1985 Sep 01.
Article
in English
| MEDLINE
| ID: mdl-9937425