Phys. Rev. Lett. 48, 523–523 (1982)Page Responds:Received 1 December 1981; published in the issue dated 15 February 1982 © 1982 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.48.523
DOI:
10.1103/PhysRevLett.48.523
PACS:
04.60.+n
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