Phys. Rev. Lett. 15, 689–690 (1965)Occurrence of Singularities in Open UniversesReceived 16 August 1965; published in the issue dated 25 October 1965 © 1965 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.15.689
DOI:
10.1103/PhysRevLett.15.689
PACS:
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