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| Utgitt
| [Princeton, N.J. : The Institute for Advanced Study , ca 1957]
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| Omfang
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| Opplysninger
| "This article was written not for publication but as material for a course of lectures to graduate students. It is reproduced by The Institute for Advanced Study with the permission of Professor Bogoliubov. The authors are not responsible for any peculiarities in the translation, which was made by a non-physicist". - Stensiltrykk
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