Phys. Rev. Lett. 3, 296–297 (1959)Field Theory CommutatorsReceived 24 August 1959; published in the issue dated 15 September 1959 © 1959 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.3.296
DOI:
10.1103/PhysRevLett.3.296
PACS:
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