A Comment on the Letter by P. O. Mazur, Phys. Rev. Lett. 57, 929 (1986).
DOI:https://doi.org/10.1103/PhysRevLett.59.2379
©1987 American Physical Society
J. Samuel and B. R. Iyer
Vol. 59, Iss. 20 — 16 November 1987
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