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Phys Rev A Gen Phys
; 39(10): 5010-5013, 1989 May 15.
Article
in English
| MEDLINE
| ID: mdl-9901062
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Phys Rev A Gen Phys
; 37(12): 4620-4624, 1988 Jun 15.
Article
in English
| MEDLINE
| ID: mdl-9899607