Key points are not available for this paper at this time.
Received 18 December 1964DOI:https://doi.org/10.1103/PhysRevLett.14.57©1965 American Physical Society
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Roger Penrose (Mon,) studied this question.
www.synapsesocial.com/papers/69d90945cc20f7a91c3afda8 — DOI: https://doi.org/10.1103/physrevlett.14.57
Roger Penrose
Physical Review Letters
Birkbeck, University of London
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